从结构上讲，间接式质量流量计就是在管道上分别装上体积流量计的（）。
A、压力计
B、温度计
C、密度计
D、显示仪
参考答案：C
企业短期融资券注册会议原则上( )召开一次，由( )名注册委员会委员参加。
A．每周；3 B．每周；5 C．每月；3 D．每月；5
What happened to businesses after the mass move
A．They established branches in suburbs.
B．They scattered here and there in cities.
C．Some bigger companies moved out.
D．They lost many employees.
