under great ____to keep up with their school work,many high school students cannot aford the time fo
题目
under great ____to keep up with their school work,many high school students cannot aford the time fo
应该填什么?A、command
B、pressure
C、request
D、schedule
答案
B、pressure
四个选项意思分别为
命令
压力
请求
附表
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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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