初一英语：单、复数句子转换,每空一词
题目
初一英语：单、复数句子转换,每空一词
This is an orenge.(复数）
____ are ______.
Are those book?(单数)
_____ _______ ________ book?
Is she your friend?(复数)
______ ________ you _______?
Where's my baseball?(复数)
Where ________ my ______?
They are on the sofa.(单数）
______ _______ on the sofa.
答案
these oranges
is this a
are they friends
are baseballs
it is
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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