everybody was required to keep the futhure plan in___ A,safety b,secret c,security d,secrecy
题目
everybody was required to keep the futhure plan in___ A,safety b,secret c,security d,secrecy
答案
b 词组in secret 秘密地;私下地
每个人都需要保密(futhure 不认识这个单词)计划
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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