流量是指单位时间内流体流过某一截面的量。
参考答案:对
If you’d like me to do the job for you, I want to ____________ in cash.
A.get paid
B.paid
C.be paying
D.pay
马蹄莲是哪种球根花卉?()
A块根
B块茎
C球茎
D鳞茎