Must the dog____ to the hospital
题目
Must the dog____ to the hospital
A.send B.is sent C.be sent D.sends
Everything___be OK with the help of the people throughout the countiy though we have sulfered a lot from the May 12th earthquake
A.can B.must C.may D.will
答案
C D
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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．
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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