求求求
题目
求求求
____they your brothers?A.Is B.Are C.Am D.Be
Is this your brother?No,___.It is my friend.A.it is B.he is not C.he isn't D.it isn't
Is the little boy____(jim)brother?用括号内所给的词的适当形式填空
That's Lily and that's Lucy.They are_____(sister)
答案
B
D
Jim's
sisters
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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