【单选题】The passage suggests that ______.
A.
the previous economic models are still applicable
B.
an extremely low jobless rate will lead to inflation
C.
a high unemployment rate will result from inflation
D.
interest rates have an immediate effect on the economy
【判断题】Economic models are most often composed of diagrams and equations.
【判断题】为了提高间壁式换热器的传热系数K值,必须设法提高α值大的那一侧流体的对流传热系数。
【判断题】为了提高间壁式换热器的传热系数K值,必须设法提高 α 值大的那一侧流体的对流传热系数。
【单选题】为了提高间壁式换热器的传热系数 K 值,必须设法提高( )的对流给热系数。