[W41] He was in hospital for about half a year. He felt as if he was ______ from the outside world.
题目
[W41] He was in hospital for about half a year. He felt as if he was ______ from the outside world.
A.cut out
B.cut off
C.cut up
D.cut through
翻译包括选项,并分析.
答案B
答案
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.
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