It is easier to float in the ocean than it is...

It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?

Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!

You Will Need:

● 3 cups of warm water

● Measuring cup (量杯)

● Wide-mouthed jar

● Salt

● Spoon

● Raw (生的)potato

You Will Do:

1. Pour 1.5 cups of warm water into the jar.

2. Add 1/3 cup of salt.

3. Stir(搅拌) until the salt is completely dissolved.

4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.

5. Gently place the potato into the jar. Do not drop it.

What Will Happen:

The potato will sink— but only halfway!

Why?

Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.

The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.

1.In the experiment, what should you do right after you pour the water over the spoon?

A．Add the salt to the water.                 B．Stir the salt into the water.

C．Place the potato in the jar.                 D．Pour warm water into thejar.

2.In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?

A．It is easier to see what you are doing.

B．It pushes the fresh water to the bottom.

C．It will keep the water from coming out.

D．It will keep the liquids from mixing together.

3.In which step of the experiment do you add the salt?

A．Step 1            B．Step 2            C．Step 3            D．Step 4

4.What does the underlined word “gently” mean?

A．Carefully          B．Quickly           C．Secretly           D．Silently

高二英语单项填空中等难度题查看答案及解析

Choosing a nice mountain bike for you is easier than learning how to ride it. Keep these tips in mind：

Decide how you are going to use your new mountain bike.

Are you a new rider who simply wants to travel outdoors on the weekend，weather permitting？Do you intend to test yourself on the rough roads，every day，rain or shine？Or are you going to use your new mountain bike to ride to and from school or work？Be honest about your intentions，and you’re more than half way toward choosing the right mountain bike for you.

Visit your local bike shops.

Any good bike shop will stock a wide range of quality mountain bikes in all price points and sizes. Your local bike shops will carry more than one brand of bicycle. Not only will they sell you a mountain bike that suits your needs，but they will service what they sell. Visit at least a few shops. You’ll get one that satisfies you right away.

Don’t be bashful.

Tell your salesperson how you intend to use your new mountain bike，and how much you are willing to spend. Your salesperson will show you a selection of models and brands accordingly. He or she will also help you determine the right size for you. You may ask more without any sense of shyness.

Take a test ride.

All good bike shops let customers take test rides. There’s a good reason for this beyond “try­before­you­buy” salesmanship. Since you already know your price range and find the right size，you now have to find out which brand you ride best. They want you to be happy with your purchase. After only a few test rides from more than one bike shop，the right mountain bike will choose you.

1.

What would be the best title for the text?

A．How to Choose a Mountain Bike

B．How to Ride a Mountain Bike

C．Where to Ride Your Local Bike

D．Why to Take a Test Ride

2.

The main purpose of visiting bike shops is________.

A．to share happiness with the salesperson

B．to seek a wide range of quality

C．to get a mountain bike that satisfies you

D．to service your new mountain bike

3.

The underlined word “bashful” means________.

A．cold            B．pitiful          C．shy     D．helpful

4.

Which of the following is probably the author’s attitude towards “try­before­you­buy” salesmanship?

A．Honorable.    B．Favorable.  C．Negative.    D．Suspicious(怀疑的).

高二英语阅读理解简单题查看答案及解析

To me, the ocean is our greatest wilderness. I love swimming in it , surfing its waves, watching it from shore and thinking about all the life living unseen under the surface.

When I take my little kids to check out tide pools, we’re overjoyed when we find a sea star or some shellfish. Lately, though, I've noticed a change in my favorite pools: there are more sea grasses and fewer animals with shells.

I can't help feeling these small changes portend something more troubling about our oceans. It matches what scientists are telling us: our oceans are being troubled by carbon dioxide that threatens corals, colorful fish, salmon, sea otters, even whales. Our oceans are facing a major change.

Every hour, a million tons of carbon dioxide from cars, factories and power plants rain down on the world’s oceans. Carbon pollution brings about a chemical reaction that turns sea water more acidic (酸的) and takes away things important for sea animals .

Some of us are already feeling the effects of this growing crisis（危机）. Shellfish farmers in the Pacific Northwest have reported a decrease in natural and farmed oysters(牡蛎). Just this week, a new studyproved the link between the huge reduction in the numbers of oysters and ocean acidification. As polar waters become more acidic, Alaskan fishermen are troubled by the future of smaller fish.

Without action, ocean acidification will have a disastrous influence on the food chain, affecting not only sea life but the people who depend on it for food and their living. Already, our oceans have become 30 percent more acidic since preindustrial times, and it gets worse every day. We can stop this frightening dream, but only if we act now.

That's why the Center for Biological Diversity has started a petition (请愿书) requesting President Obama and the Environmental Protection Agency to develop a plan to deal with ocean acidification. Decisive action can save sea life as we know it.

Now it isn’t too late to save our oceans and sea life. With immediate action to reduce carbon dioxide release we can start taking important steps today to deal with this disastrous situation. Join me in our petition calling for a national plan to save our oceans.

1.The author’s recent visits to the tide pool brought her ___ .

A．happiness         B．anger             C．concern          D．comfort

2.The underlined word “portend” in Paragraph 3 probably means ___ .

A．predict           B．prevent           C．replace           D．reduce

3.What the author worries about most is ____ .

A．the harm of sea grasses

B．carbon pollution in the sea

C．that the petition may be turned down

D．how fishermen can make a living in the future

4.What is the main purpose of the text ?

A．To inform.         B．To educate.        C．To persuade .       D．To instruct.

高二英语阅读理解中等难度题查看答案及解析

If they are close to the cinema entrance or 　　　　 ,it is easier for disabled people to get to the film in comfort.

A. educator　　 B. exit　　 C. eruption　　 D. existence

高二英语单项填空中等难度题查看答案及解析

It is easier to go to university than before, but it is more difficult to find a job. Being a student in a　　　　　　 agriculture(农业) university, I want to try my luck to hunt for a job. As you know, few people think 　　　　　　 of an agriculture university, especially one which is not famous. Most graduates from our university can---38---to be treated coldly.

Last year, a 　　　　　　 from our university attended a talent fair (人才市场) held in Guangzhou. He joined a queue to　　　　　　 in his resume (简历) for an interview. When his　　　　　　 came and his university was introduced, the interviewer said with a sneer, “What? I’ve never　　　　　　 of that university. Go! Next one!” He waved his hand 　　　　　　 even taking a look at the resume and took no notice of the graduate’s request for a chance to show his skills and knowledge.

How　　　　　　 the graduate was! I wonder what these employers(雇主) really want: the name of a famous university　　　　　　 knowledge and technology?

It is true that some students from common universities don’t have the same abilities as those from key ones, but that doesn’t　　　　　　 that all of us are less able students. We are sure to　　　　　　 the employers with our skills if they give us a chance.

1.A. keyB. Usual　　　　 C. special    D. common

2.A. highlyB. lowly    C. little    D. greatly

3.A. needB. expect    C. hope    D. wish

4.A. graduateB. teacher    C. parent    D. professor

5.A. giveB. share    C. let    D. hand

6.A. timeB. chance    C. turn    D. interview

7.A. seenB. heard    C. listened    D. noticed

8.A. withB. up    C. without    D. away

9.A. disappointedB. amazed    C. pleased    D. stupid

10.A. soB. and    C. but    D. or

11.A. adviseB. say    C. mean    D. translate

12.A. warnB. impress    C. show    D. encourage

高二英语完形填空中等难度题查看答案及解析

It’s easier to catch a _____ lion than the one that’s awake.

A. sleep       B. slept      C. sleeping   D. to sleep

高二英语单项填空中等难度题查看答案及解析

.In my opinion, life in the twenty-first century is much easier than _______.

A. that used to be     B. it is used to    C. it was used to      D. it used to be

高二英语单项填空简单题查看答案及解析

In my opinion, life in the twenty-first century is much easier than ________.

A. that used to be     B. it is used to     C. it was used to    D. it used to be

高二英语单项填空简单题查看答案及解析

It’s said that in that area there is more land than the government knows ______.

A．it what to do with                       B．what to do it with

C．what to do with it                        D．to do what with it

高二英语单项填空中等难度题查看答案及解析

It is really hard to say which is better than the other，city life or rural life.__66__

Living in a city，people have certain advantages. First，people enjoy various entertainments，both foreign and domestic. Second，there are more cultural activities in a city. Third，city people gain access to better information service and educational facilities.__67__The overcrowded population，traffic jam，housing problem，industrial pollution and other issues may result in depression，nervousness and diseases.

Life in the village and on the farm is very different from life in the city. Living in the country，people can enjoy living in pure nature.__68__But rural life may not be that perfect. People usually lack cultural activities. They are relatively ill informed.__69__And people miss some golden opportunities of making a fortune. Opportunities for bright young people are greater in cities，so the chances of their children being admitted to colleges are slim.

Obviously，whatever life they lead，people can never feel perfectly satisfied，for conveniences and inconveniences always coexist. People wish that they could enjoy the pleasures of both lives. With the rapid economic development，nowadays city people can relax themselves in the country during vacation.__70__

E．However，problems exist.

F．And country people have chances to experience city lifestyle when they come to cities.

G．City life is obviously much more comfortable.

高二英语信息匹配中等难度题查看答案及解析