柴油机由停车状态进入工作状态，必须借助外部能量的驱动使其启动运转，直至喷入汽缸的燃油自行发火燃烧，柴油机才能自行运转。
参考答案：对
We finally bought several books by Shakespeare, ______ is one.
A．which of them
B．which of whose
C．of which this
D．and of them
下列（）属于我国会计师事务所可以从事的业务。
A.审计业务
B.审阅业务
C.内部控制鉴证
D.管理咨询
