英语填空几道、、大家帮下忙、、
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英语填空几道、、大家帮下忙、、
You need to buy some exercise books_______math class.
He often goes to the park______ his friends.
_______fact,I don't like thrillers.
________ the same reason ,we go there to see him,too.
He wants to learn a lot ______ American history.
My mother often helps me ______ my homework.
答案
for
with
In
For
about
with
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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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