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【单选题】
下列哪项不属于蓝细菌的特性（）。A.
无鞭毛
B.
含叶绿素 a
C.
革兰氏阳性
D.
产氧
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【单选题】How much more power is there in wind at 10 m/s compared to 2 m/s?
A.
5 times
B.
25 times
C.
125 times
D.
625 times
【简答题】阅读理解。 A recent study, which was published in last week's Journal of the American Medical Association, offers a picture of how erous it is to get a lift from a age driver. Indeed, a 16-year-old...
【简答题】A recent study, which was published in last week’s Journal of the American Medical Association, offers a picture of how erous it is to get a lift from a age driver. Indeed, a 16-year-old drive...
【简答题】设F(x)是f(x)的一个原函数，则∫e^－xf(e^－x)dx等于( )
【简答题】以色列—犹太王国的建立者 5 。
【单选题】听力原文：W: How do you pay for your purchases with a credit card? M: Usually I sign a sales slip in the presence of the seller, and the signature is then compared to the signature on the card. Q: Where sh...
A.
On his card.
B.
On the goods.
C.
On a sales slip.
D.
On the invoice.
【单选题】设F（x）是f（x）的一个原函数，则∫e-xf（e-x）dx等于下列哪一个函数？（）
A.
F（e-x）+c
B.
-F（e-x）+c
C.
F（ex）+c
D.
-F（ex）+c
【单选题】听力原文：W: How do you like the old black and white movies of the forties, and fifties compared with the modem ones? M: For their time, the movies of the forties and fifties were excellent. But try to com...
A.
They am better than the modem movies.
B.
There is more technology in them.
C.
The technology in them cannot be compared with that of modem ones.
D.
They are excellent to us now.
【简答题】阅读理解。 In the United States,train transportation is unpopular compared with cars and airplanes. Most people like traveling by car or by air. Officials of the United States Department of Transportation ...
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