英语选择.填空.连词成句
题目
英语选择.填空.连词成句
1.i saw him yesterday.he__to America.A.mustn't have been.B.mustn't have gone.C.
can't have gone.D.can't have gone.
2.the old man__(retire)two years ago
3.he said that he__(can)help me whit my work.
4.let me__(introduce)my friend to you.
5.he__(live)here since he was young.
6.Today is his__(six)birthday.
7.(陈述句)the.mother.boy's.let.will.swim.him.not.the.in.river.
答案
A
我昨天才见到他,他一定没去美国.
retired
could
introduce
has been living
sixth
The boy's mother will not let him swim in the river.男孩的母亲不会同意他在河里游泳.
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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.
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