干操介质的温度和（）对生球干燥速度影响很大。
参考答案：流速
已知：a，b互为相反数，cd互为倒数，|x|=3，则4cd﹣a﹣b+x=（ ）。
— My room gets very cold at night.
— ________. [ ]
A. So is mine
B. So mine is
C. So does mine
D. So mine does
