He gained ___ wealth by printing ___ works of famous writers.

A．quite a few; quite a little

B．a great deal of ;a large quantity of

C．a lots of; a large number of

D．a plenty of ; a good amount of

加油机在工作时，计量器在排出油液体积的同时，通过传动轴带动脉冲发生器内（）旋转，从而向主板发出计数脉冲信号。

A.传感器

B.分度盘

C.光敏二极管

D.三极管