HE (never) returns the books on time.括号提问 ______ ________ does he return the books on time?
题目
HE (never) returns the books on time.括号提问 ______ ________ does he return the books on time?
2.when l stayed in the town,l visited some schools.
___my_____in the town,l visited some schools.
3.last sunday alice fell on the ice many times.
last sunday alice had_______ _________on the ice.
4they ate against our project.
they aren't_________ _______of our project.
答案
How often
During staying
many falls
in favour
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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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