____ you____ free tomorrow?No,i____ free the day after tomorrow.
题目
____ you____ free tomorrow?No,i____ free the day after tomorrow.
A.Are;going to; will
B.Are; going to be; will
C.Are; going to; will be
D.Are; going to be; will be
答案
D.
因为free是形容词,所以前面一定要有be动词的.只有D相符合、
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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.
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