【单选题】What characteristic of the endogenous growth model is crucial in giving the possibility of sustained growth?
A.
It is embodied in people.
B.
It has constant returns to scale in production.
C.
It takes time to accumulate it.
D.
It grows at the same rate as consumption.
【单选题】下列关于酶的活性中心的叙述正确的是 ( )
B.
活性中心只是必需基团的作用,与整个酶分子无关
【多选题】下列关于酶的活性中心的叙述正确的是 ( )。
B.
酶的活性中心为酶与底物结合并催化底物反应的部位。
【判断题】制作带电作业时使用的工具的绝缘材料,要求吸水性低
【判断题】制作带电作业时使用的工具的绝缘材料,要求吸水性高。
【单选题】In the endogenous growth model, workers divide their time between market work and
A.
accumulating physical capital.
B.
accumulating human capital.
C.
trying to invent new production processes.
【单选题】In the Solow growth model, technological change is ______, whereas in endogenous growth theories, technological change is ______.
【单选题】如图所示,G90指令中X(U)_Z(W)_指的是( )的坐标。
【单选题】污水泵房集水池宜装置冲泥和淸泥等设施,抽送含有焦油等类的生产污水时,益有()设施。