【单选题】The phrase 'to a good cause' in line 3 could be best replaced by ______.
B.
to support a sound principle
D.
to protect a wise investment
【单选题】设ch是char型变量,其值为A,且有下面的表达式: ch=(ch>='A'&&ch<='Z')?(ch+):ch上值是
【单选题】设ch是char型变量,其值为A,则下面的表达式的值是 ch=(ch>='A'&&ch<='Z')?(ch+32):ch
【判断题】逆时针旋转时旋入的螺纹称为右旋螺纹。( )
【单选题】设ch是char型变量,其值为A,且有下面的表达式 ch=(ch>='A'&&ch<='Z')?(ch+32):ch