新概念英语二册第二单元测试题答案(pre-unit test3/
题目
新概念英语二册第二单元测试题答案(pre-unit test3/
答案
Key Structures A a 1 I enjoyed the film yesterday. 2 My mother went to market. 3 (This morning) the children asked questions continuously in class. 4 (On Sundays) we stay at home. 5 (This morning) I b...
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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