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【简答题】
已知向量a,b,其中|a|= ,|b|=2,且(a-b)⊥a,则向量a和b的夹角是________.
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反馈参考答案：
举一反三
【单选题】The more self-knowledge we have, the more control we can _____ over our feelings and behavior.
A.
exert
B.
operate
C.
utilize
D.
apply
【单选题】We can infer from the last paragraph that
A.
the more calluses a person has, the more professional he would be.
B.
writers often base their writing on personal experiences.
C.
Conan Doyle has gone through a period of hardship on his way to success.
D.
inspiration was very important for a person to create something.
【单选题】The more facilities we can provide, the more people will be ( ) to the area.
A.
distracted
B.
attracting
C.
attracted
D.
distract
【单选题】On the Internet, we can read news at home and abroad and get as much information as we can. We often send e-mails or make telephone calls to our families as well as to our friends by Internet. What’s ...
A.
Keep away from the Internet.
B.
Surf the net.
C.
The Internet is playing an important part in our daily life.
D.
We can entertain ourselves on the Internet.
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