回转装置的电机功率（）.
A、P=2x6kW
B、P=2x9kW
C、P=2x10kW
D、P=2x11kW
参考答案：D
—What's your favourite Chinese traditional festival ?
—It's _____. [ ]
A. April Fool's Day
B. Christmas Day
C. Spring Festival
D. Thanksgiving Day
主要的反应条件有哪些？
