设n∈N*，则Cn1+Cn26+Cn362+…+Cnn6n-1=______．

下列各句中，没有语病的一句是（ ）

A．作为一名杰出的政治家和诗人，于谦为人正直，不畏强暴，他短暂而壮烈的一生，是他那四句自勉诗的真实写照。

B．我们可以在街头随处可见各类商店出售不同档次的商品，而且卖得很火。

C．神舟5号宇宙飞船载着杨利伟胜利返回地球，这是我们国家自行研制的，每一个中国人不能不为它骄傲。

D．在市场经济发展的初期，许多发达国家曾为此付出过社会伦理道德几乎崩溃的惨重代价。

wAIS—Rc的测量技术主要包括提问技术、鼓励回答技巧和（）。

A.书写回答格式

B.记分方法

C.对结果的解释

D.计算智商的方法

阅读理解。

     Even when you're extremely busy, you aren't using your time with 100% efficiency. There are

gaps in everyone's schedule where they aren't doing anything important. Even if your schedule has

no gaps, there is probably lots of time where you aren't working as fast or as effectively as you

possibly could.

     Why aren't you completely efficient? It's because time isn't the limiting factor. If it were the

limiting factor, people could work non-stop without breaks or any unproductive distractions(消遣).

Instead, people, even those who are highly productive, need to take breaks, occasionally

procrastinate(拖延) and slow down on tasks throughout the day.

     The real and most important limiting factor for productivity is your energy levels to pay attention.

Energy levels limit your productivity because when you're tired, you can have ample time and still

not get everything done. Your attention ability is also limited, because even if there are a million

things that need to be done, you can only focus on one or two at a time.

     You might not be able to insert another 4-5 hours into your schedule without making some

sacrifices(牺牲). But even extremely busy people can add an hour or two into their schedule

without cancelling anything. The reason it's hard to "find time" isn't a lack of time. It's because

you don't have enough energy left to focus on something else that needs to fit into your day.

     I first suspected time wasn't the real problem during an extremely busy period in my life over

a year ago. I was insanely busy, but at that time I still exercised regularly. I had daily to-do lists

with over twenty items, and I still found time to exercise. However, after a few weeks off, due to

illness, I stopped exercising. I was not busy by any standards, in fact, my schedule was incredibly

light. Despite this free time, I found it hard to find time to exercise. It seemed to get pushed later

and later into my schedule until it was gone. How can I explain this odd experience? I believe y

ou have known it.

1. If someone can't work with 100% efficiency, the most important limiting factor is ________.

A. a schedule without gaps           

B. breaks and distractions

C .the limited time                      

D. the limited energy

2. According to paragraph 4, everyone, including the extremely busy people, can ___________.

A. work without any rest                 

B. focus on many things at a time

C. find some more time in a day            

D.do some exercise regularly

3. After a few weeks off, what was the change of the writer's life?

A. He had a longer daily to-do lists with over twenty items.

B. He stopped doing exercise because of the lack of energy.

C. He found it hard to find time to exercise because he was busier.

D. He pushed most of the things later and later in his schedule.

4. The writer gives the example of himself in the last paragraph in order to ___________.

A. prove what the real limiting factor is  

B. show us how busily he needs to work

C. explain how important a healthy body is  

D. tell us what an odd experience he has

5. What is the best title of the passage?

A. Are You Really Lack of Time?          

B. How Can You Work Efficiently?

C. What Makes Your Energy Limited?      

D. When Should You Do Exercise?

下列哪个不是治疗冠心病的常用西药（）

A.抗血小板药物如阿司匹林

B.β-受体阻滞剂如普萘洛尔

C.调脂药物如辛伐他汀

D.降糖药如那格列奈

当起落架空地传感器的作动器接近传感器时，会使常闭电门（）

A.闭合

B.断开

C.位置不变

D.短路