Maria was in Germany last year.She____German there
题目
Maria was in Germany last year.She____German there
A.would learn B.was learning
答案
B
过去正在发生的事情
如果要表示她本将要在那里学德语的话
应该是she would have learned German there
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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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