过去进行时的句子50个
题目
过去进行时的句子50个
答案
10 He was repairing his bike.11Were you playing basketball at four yesterday afternoon?昨天下午四点你们在打篮球吗?12When/While we were having supper,the light went out.我们正在吃饭时灯熄灭了.13 I was ...
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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