在Generator函数中，yield*语句的作用是：（)。

The ship’s generator broke down, and the pumps had to be operated ___ instead of mechanically.

A) artificially B) automatically C) manually D) synthetically

to be operated ___ instead of mechanically.

A) artificially B) automatically C) manually D) synthetically

to yield ________ any military threat.

A) up B) to

C) in D) at

Extensive reporting on television has helped to _________ interest in a wide variety of sports and activities.

A) assemble B) generate C) yield D) gather

证明函数

在(-∞,∞)上连续.(证明中可利用公式

A.12

B.3

C.6

D.26

A.this.x

B.that.x

C.x

D.app.x

A.本类中非静态的成员函数

B.本类中非静态的常量数据成员

C.本类中的静态数据成员

D.本类中其它的静态成员函数