--- A microwave oven must be a big convenienc...

--- A microwave oven must be a big convenience to a busy couple．

--- ________ , dear ．But when do you plan to get it ?

A．Just can’t agree more           B．A pleasure

C．Good idea                        D．No wonder

高三英语单项填空中等难度题查看答案及解析

Microwaves may be great at warming up food, but what about warming people?

Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.

To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. / sq. cm. ) ; a satisfactory feeling of warmth occurs between 35 and 50mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.

In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)

While it might be some time before homeowners are comfortable enough with the idea to set up whole-body microwave heaters in houses, Buffler says microwaves may attract livestock(家畜) farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.

1.Which of the following can tell the main idea of the passage?

A．A new heating system.                   B．A new microwave oven.

C．A popular technique.                     D．The magnetron.

2.According to Paragraph 2, which of the following does not describe the characteristics of a microwave heater?

A．It directly heats people in a room.

B．It heats walls and furniture in a room.

C．It is safe.

D．It saves energy.

3.The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ________________.

A．20 mw. / sq. cm.    B．40 mw. / sq. cm.     C．60 mw. / sq. cm.     D．85 mw. / sq. cm.

4.According to Paragraph 4, which of the following fills the room with low-power microwaves?

A．The magnetron.                        B．The motion detector.

C．The microwave oven.                    D．The radiation-absorbing chemical.

5.Which of the following statements about microwave heaters would Buffler most probably agree with?

A．Microwave heaters will soon be widely used by homeowners.

B．Microwave heaters sometimes make people feel uncomfortable.

C．Perhaps microwave heaters will be first used by livestock farmers, who wish to protect their lambs in winter.

D．Microwave heaters cannot be accepted by the public because they are somewhat unsafe.

高三英语阅读理解中等难度题查看答案及解析

Microwaves may be great at warming up food, but what about warming people?

Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Buffler of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.

To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. /sq.cm.); a satisfactory feeling of warmth occurs between 35 and 50 mw./sq.cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw./sq.cm. And a frozen meat pie in your microwave oven receives about 1000 mw./sq. cm.

In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwaves oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)

While it might be some time before homeowners are comfortable enough with the idea to set up whole body microwave heaters in houses, Buffler says microwaves may attract livestock farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.

1. Which of the following can tell the main idea of the passage?

A. A new heating system.    B. A new microwave oven.

C. A popular technique.     D. The magnetron.

2. The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ____.

A. 20 mw. / sq. cm.         B. 40 mw. / sq. cm.

C. 60 mw. / sq. cm.         D. 85 mw. / sq. cm.

3. According to paragraph 4, which of the following fills the room with low-power microwaves?

A. The magnetron.       B. The motion detector.

C. The microwave oven.      D. The radiation-absorbing chemical.

4. Which of the following statements about microwave heaters would Buffler most probably agree with?

A. Microwave heaters will soon be widely used by homeowners.

B. Microwave heaters sometimes make people feel uncomfortable.

C. Microwave heaters will be probably first used by livestock farmers to protect their lambs in winter.

D. Microwave heaters cannot be accepted by the public because they are somewhat unsafe.

高三英语阅读理解中等难度题查看答案及解析

Microwaves may be great at warming up food, but what about warming people?

Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.

To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 kilowatts per square centimeter (mw. / sq. cm. ) ; a satisfactory feeling of warmth occurs between 35 and 50 mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.

In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)

While it might be some time before homeowners are comfortable enough with the idea to set up whole-body microwave heaters in houses, Buffler says microwaves may attract livestock(家畜) farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.

1. Which of the following can tell the main idea of the passage?

A. A new heating system.

B. A new microwave oven.

C. A popular technique.

D. The magnetron.

2. According to Paragraph 2, which of the following does not describe the characteristics of a microwave heater?

A. It directly heats people in a room.

B. It heats walls and furniture in a room.

C. It is safe.

D. It saves energy．

3. The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ________________.

A. 20 mw. / sq. cm.                   B. 40 mw. / sq. cm.

C. 60 mw. / sq. cm.                   D. 85 mw. / sq. cm.

4. According to Paragraph 4, which of the following fills the room with low-power microwaves?

A. The magnetron.

B. The motion detector.

C. The microwave oven.

D. The radiation-absorbing chemical.

5. Which of the following statements about microwave heaters would Buffler most probably agree with?

A. Microwave heaters will soon be widely used by homeowners.

B. Microwave heaters sometimes make people feel uncomfortable.

C. Perhaps microwave heaters will be first used by livestock farmers, who wish to protect their lambs in winter.

D. Microwave heaters cannot be accepted by the public because they are somewhat unsafe.

高三英语阅读理解中等难度题查看答案及解析

The public transportation is very convenient in that big city , so there______be any difficulty in

traveling around .

A．mustn’t     B．wouldn’t         C．shouldn’t        D. needn’t

高三英语单项填空中等难度题查看答案及解析

The public transportation is very convenient in that big city, so there ________ be any difficulty in traveling around.

A．mustn't      B．wouldn't

C．shouldn't      D．needn't

高三英语单项填空中等难度题查看答案及解析

This is a very convenient place to live in,________is an airport connecting all the big cities.

A. 20 km northwest of it                                B. 20 km northwest of which

C. northwest 20 km to it                                D. northwest 20 km of which

高三英语单项填空中等难度题查看答案及解析

单句语法填空

1.It is more convenient_________you to go outside with a car.

2.The new government must set_________ finding solutions to the country's economic problems.

3.They decided_________the date for the picnic.

4.I'm cautious_________what I say because careless remarks are likely to hurt others' feelings.

5.Under good treatment, Helen is beginning to pick _________and will soon come back to school.

6.I thought I could get the job, but _________ expectations, I didn't.

7. The body of the machine is made of _________ (stain) steel,which stays bright under any circum­stances.

8.The invitation was beyond all my _________ (expect).

9. Shopping bags are provided for the customers' _________(convenient).

10.The car ahead of us stopped_________ (abrupt) and our car narrowly hit it.

高三英语语法填空中等难度题查看答案及解析

HOW BIG should a business team be?It is an enormously important issue for companies, Teams that are too small may lack the skills required to get the job done:teams that are too big may be impossible to co-ordinate.

Robin Dunbar.an anthropologist at Oxford University,has done a lot of work on primate(灵长目）groups.His argument is that the size of the group is linked to the size of the brain.With their large brains,humans can cope with larger bands,A larger social group has many advantages,allowing for greater protection and specialization.

Whereas 150 is sometimes referred to as the"Dunbar number",the academic himself in fact refers to a range of figures.He observes that humans tend to have five intimate friends,15 or so good friends,around 50 social friends and 150-odd acquaintances.

Running a larger network can be difficult.The armed forces have spent more than 1,000 years experimenting with unit size.A Roman centurion(百天长）oversaw 100.The modern American army company has 180 members.Britain's equivalent numbers 120.These are rough estimates,rather than fixed figures.But it is striking that many group activities seem to be close to a Dunbar number. The Special Air Service of Britain has four-man patrols;when your life depends on it,you need to have absolute trust in your colleagues.As a result,such groups are limited in size.

For much of economic history,work was conducted in small units by peasants,tenant farmers and craftsmen.The coming of powered machinery enabled production at a much larger scale,with workers crowded into factories.These days the rise of the service economy means that workers are no longer concentrated in such large groups.

This may not be a bad thing.It was easy for employees in large factories to regard remote company owners as "them"rather than"us".The modern company may settle on a model with a small group of"core"workers and a larger group of contract workers.The result may be more united within the core staff but the non-core staff may be less well treated.The small core teams may work effectively.The big question will be the effect on morale of those outside those teams.

1.What does the first paragraph serve as in the whole article?

A.An example of the topic,

B.An introduction to the topic,

C.A guide to the whole article,

D.No relation to the passage at all.

2.What does the underlined"This"in the last paragraph refer to?

A.Workers crowded into factories

B.'These days the service economy has risen.

C.Workers are no longer concentrated in such large groups.

D.Employees regard company owners as"them"rather than"us".

3.What is probably the best model for a company according to the author?

A.A large group of exact 150 workers.

B.A small group of less than 15 core workers.

C.A small group of peasants and a large group of factory workers.

D.A small group of efficient workers and more contract workers.

4.What is the main purpose of writing the text?

A.To offer companies some useful advice.

B.To introduce us the most suitable size of teams.

C.To arouse the readers' interest in Robin Dunbar.

D.To persuade companies to adopt the"Dunbar number".

高三英语阅读理解困难题查看答案及解析

In yesterday’s business training course the consultant instructed us that a good salesman must be ______ if he wants to succeed.

A. aggressive　 B. conventional

C. visual　　　　 D. fragrant

高三英语单项填空中等难度题查看答案及解析