无触点电子点火系按信号发生器工作原理分哪几部分?
参考答案:
可分为磁感应式、霍尔式、光电式、电磁振荡式等。
Spacecraft “Discovery” has failed in the course of launch.
----_______? They have been preparing for the test.
A.How come
B.When
C.How
D.Why not
下列方法中能完成主类实例初始化工作的是
A.start()
B.stop()
C.init()
D.paint()