—Daddy, do you believe I can swim ______ to catch up with Ben!

—Great, dear! But I don’t have ______ to watch your match. I hope to hear your good news.

A．fast enough, time enough

B．enough fast, enough time

C．enough fast, time enough

D．fast enough, enough time

通过（）试验掌握了机组转速的变化过程，进而就能够对机组调速系统的调节品质、动态特性等的优劣做出评价。

A.大负荷

B.超速

C.空负荷

D.甩负荷