— Could I have the small table by the window?...

— Could I have the small table by the window?

— Sorry, sir. It ______ in advance.

A. booked                            B. will be booked                C. had booked                   D. has been booked

高二英语单项填空中等难度题查看答案及解析

—Waiter! Is the table by the window available?

—I’m sorry, sir. But that table has been ____.

A. broken　　　 B. sold　　 C. reserved　　 D. repaired

高二英语单项填空中等难度题查看答案及解析

— Excuse me, sir, could you tell me how to go to the City Hall?

— Sorry, I’m a new comer. You have to ask, I’m afraid, ______ is a native.

A. someone           B. whoever           C. who            D. whomever

高二英语单项填空中等难度题查看答案及解析

Weather could power the next generation of smart windows. Researchers have created glass by harvesting energy from wind and precipitation(降水).The approach offers an alternative to other smart windows powered by batteries, solar panels, and even standard power outlets. “The creation represents a new kind of renewable energy source”, says Liming Dai, a nanomaterial engineer at Case Western Reserve University in Cleveland, Ohio, who was not involved in the research.

Smart glass, which changes its characteristics to block out light or heat, has been around for decades. Common examples include glare-fighting rearview(后视) car mirrors and windows that change color for energy savings and privacy. But many are expensive, and people are still looking for eco-friendly ways to power the windows. Batteries and plug-in outlets aren’t apparently “green”, and built-in solar panels can cloud or hide parts of the glass.

In experiments, the glass produced up to 130 milliwatts per square meter, enough to power a pacemaker or a smart phone while it’s asleep, the team reported online last month in ACS Nano. This output might suit many applications, such as being a power source for home or office electronics, says co-developer and scientist Zhong Wang of the Georgia Institute of Technology in Atlanta Since their first project in 2012, a light-up sidewalk powered by footsteps, he and his colleagues have miniaturized their generators to create everything from self-cleaning keyboards to sensors for security systems.

But Wang and colleagues still have more work to do before this smart glass is ready for commercialization. Now, the glass has no way to store the energy it creates. To solve this problem, Dai says, transparent supercapacitors(超级电容器) could be placed into the glass without decreasing visibility.

For now, the team wants to improve the energy efficiency of their nanogenerators. These tiny power plants can convert about 60% of the mechanical energy that they encounter into electricity. “The output power is a constant goal,” Wang says. “Free energy surrounds us, and anything can happen if you take control of it."

1.What is unique about the smart glass?

A.It can protect privacy. B.It is more expensive.

C.It is powered by weather. D.It can block out light and heat.

2.What is the main idea of paragraph 3?

A.The research history of Zhong Wang.

B.The experimental process of Zhong Wang.

C.The research theory of Zhong Wang’s team.

D.The experimental findings of Zhong Wang's team.

3.What is the drawback of the smart glass?

A.It cannot suit the supercapacitors. B.It cannot keep its produced electricity.

C.It cannot power a smart phone. D.It cannot change its color according to weather.

4.Which of the following best explains “convert” underlined in the last paragraph?

A.Transform. B.Consume.

C.Waste. D.Reserve.

高二英语阅读理解中等难度题查看答案及解析

．Sorry, sir. I broke the window glass, but I didn’t do that ______.

高二英语单项填空简单题查看答案及解析

单词拼写

1.I’m sorry sir. You can’t sit here because this table is r__________ (预订的).

2.The matches between Manchester United and Liverpool are always ________ (值得) watching.

3.It appears that all second-hand cars for sale on that website are in perfect ________ (状况).

4.The teacher wants the children to ask questions ________ (自信地) whenever they don't understand.

5.As a result of the death of his parents, love was totally a________ (不存在的) from his childhood.

6.We would like to sincerely ________ (道歉) for the late departure of this flight.

7.At the dancing, Mr Darcy ________ (表现) like a true gentleman and impressed everyone.

8.I didn't ________ (犹豫) for a moment about taking the job.

9.He is too ________ (固执的) to admit that he was wrong.

10.The ________ (拥有) of a passport is essential for foreign travel.

高二英语单词拼写中等难度题查看答案及解析

All the tables by the window _________ by telephone when I got to the restaurant.

A.are booked B.had been booked

C.were booked D.have been booked

高二英语单项填空中等难度题查看答案及解析

— Can I pay the bill by check?

— Sorry, sir. But it's the management rules of our hotel that payment ______be made in cash.

A. can                                    B. need                                 C. will                                    D. shall

高二英语单项填空中等难度题查看答案及解析

—Can I pay the bill by check?

—Sorry, sir. But it is the management rules of our hotel that payment 　　 be made in cash.

A. shall　　　　 B. should　　　　　　 C. can　　　　　　 D. will

高二英语单项填空中等难度题查看答案及解析

—Can I pay the bill by check?

—Sorry, sir．But it is the management rules of our hotel that payment ____ be made in cash．

高二英语单项填空困难题查看答案及解析