2.There is nothing s________ with you,you would better stay in bed ahd have a rest.
题目
2.There is nothing s________ with you,you would better stay in bed ahd have a rest.
5.There are many m_________ factories in Chana now
3.We took a lot of pictures in Beijing with our c_________.4.I can learn a lot with the r_______ books.
这些也填
答案
serious
machine
camera
reference
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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