【单选题】A surplus occurs when the price is (价格过剩时会出现盈余——中文由在线翻译而来,仅供参考.下同.)
A.
less than the equilibrium price.小于均衡价格。
B.
equal to the equilibrium price.等于均衡价格。
C.
greater than the equilibrium price.大于均衡价格。
D.
None of the above because the existence of a surplus is independent of the price of the good.以上都没有,因为存在盈余是独立于物价的。
【简答题】当离心泵出口阀门开大时,流量___,泵出口压力____。 (填 变大 , 变小 , 不变 )
【单选题】当离心泵的出口阀门开大时,离心泵的扬程随流量的增大而?
【单选题】ABC控制法中,A类产品的资金比重为()
【单选题】Most earthquakes occur within the upper 15 miles of the earth's suce. But earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 ...
A.
The number of earthquakes is closely related to depth.
B.
Roughly the number of earthquakes varies much every year.
C.
Earthquakes are most likely to occur within the upper 15 miles of the earth's suce.
D.
Earthquakes are most likely to occur near the suces.
【单选题】Economics is the study of (经济学是研究的——中文由在线翻译而来,仅供参考.下同.)
A.
the distribution of surplus goods to those in need.剩余货物向有需要的人分配。
B.
affluence in a morally bankrupt world.在一个道德上破产的世界中的富裕。
C.
the choices we make because of scarcity.我们因稀缺而做出的选择。
D.
ways to reduce wants to eliminate the problem of scarcity.减少想要消除稀缺问题的方法。
【单选题】下列表述中,对于实施创新驱动发展战略的不正确理解是( )。
【简答题】当离心泵出口阀门开大时,流量___,泵出口压力___ _ 。 ( 变大 , 变小 , 不变 )
【简答题】The ________(剩余物)of the meal were fed to the dog.
【简答题】质点作半径为 0.5 m 的圆周运动,其角位置的运动学方程为 θ =0.5 t 2 (SI) ,则其切向加速度为 ____m/s 2 。