when did you come here ()the end of last month How long have you been here?”
题目
when did you come here ()the end of last month How long have you been here?”
How long have you been here?” “_______ the end of last month.”
when did you come here ()the end of last month ,i think
When shall we finish the project?--- _______ the end of this month,I think
a.since
b.by
c.at
这如何区别哪
答案
How long have you been here?” “___a. since____ the end of last month.” since+过去时间点,是指一段时间,回答how longwhen did you come here (c. at)the end of last month ,i think at the end of......
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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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