请写出原因
题目
请写出原因
1.Dave _____a letter from his friend in America yesterday.
A.get B.has got C.received D.accepted
2.You_____hand it in at once,you may hand it in tomorrow.
A.needn't B.may not C.can't D.must not
答案
1.--------C.received -------收到
2.-------A.needn't ------不必
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
最新试题
热门考点