Your school things should _____.
题目
Your school things should _____.
A.be looked after well B.be looked well after
C.be taken good care D.be taken care of well
No one has yet succeeded in explaining the _____ of how life began.
A.puzzle B.problem C.cause D.reason
The missing boys were last seen ______ near the river.
A.playing B.to be playing C.play D.played
说明理由,
答案
A.be looked after well
A.puzzle
A.playing
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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