某柴油机转速n=1000r/min,有效功率户为1987kW。该工况下的输出扭矩是多少?
参考答案:
因为: 所以输出扭矩:
我国著名史学家钱穆在《中国历代政治得失》一书中讲到:“汉宰相是采用领袖制的,而唐代宰相则采用委员制。”这里的“委员制”是指
A.三公九卿制
B.郡县制
C.三省六部制
D.内阁制
In our own galaxy, the Milky Way, there are perhaps 200 billion stars, a small part of them probably have planets on which life is feasible.
A.a small fraction in which
B.a small fraction of which
C.a small fraction which
D.which a fraction of