选择填空 Yang Liwei ()about 21 hours in ()around the earth 14 times A.took,
题目
选择填空 Yang Liwei ()about 21 hours in ()around the earth 14 times A.took,
选择填空
1.Yang Liwei ()about 21 hours in ()around the earth 14 times
A.took, going B.spent, going C.waiting
2.I’m sorry to have kept you ()for a long time.
A.wait B.to wait C.waiting
3.()the teacher’s help , we have made great ()
A.Under , Progresses B.With , progress C.Under , progress
4.Please write to me as soon as you()Shanghai .
A.arrive B.reach C.get
5.The accident happened () a cold morning .
A.in B.at C.on
6.It ()that China has mae great progress in developing its space industry .
A.said B.proved C.has proved
7.I think it’s very necessary ()us()learn English well
A.for , for B.to , to C.for , to
8.So far , man ()manned satellites into space successfully .
A.sent B.has sent up C.have sent up
9.It’s ()news . We are
答案
B
C
B
B
C
C
C
B
B
A
B
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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