沏茶时的温度以100℃为好,这样可以充分把茶泡开。
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介绍经纪商(IB)在国际上既可以是机构也可以是个人,但一般都以个人的形式存在。()
A. 正确
B. 错误
A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of ()
A. water contamination
B. mixing oils of two widely different viscosities
C. overheating
D. aeratio
The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by ().
A. direct action of cam shaft
B. compressed air pressure
C. hydraulic “push rods”
D. direct action of the main piston moving dow
患者,女。月经50天一行,量少色淡,无块,头晕眼花,心悸少寐,舌淡脉细。应首选()
A. 大补元煎
B. 归脾汤
C. 八珍汤
D. 参芪四物汤
E. 柴胡疏肝散