《220-500kV变电所计算机监控系统设计技术规程》规定，整个系统对时精度误差不大于（）
A.1μs
B.10μs
C.1ms
D.2ms
参考答案：C
I earn 10 dollars ________hour as ________supermarket cashier on Saturday.
A．an；the
B．the；a
C．an；a
D．a；an
—Granny, you look so weak. What's wrong with you?
—Terrible. The factory made ______ noise. It was _____ noisy that I couldn't sleep well last night. [ ]
A. too much, so
B. much too, so
C. too much, too
D. many, much
