鼠标器与轨迹球、操纵杆(跟踪点),是用于操纵屏幕上光标位置的输入设备。
查看答案
左移运算符是:( )
A. <
B. >
C. <<
D. >>
右移运算符是:( )
A. <
B. >
C. <<
D. >>
unsigned char、unsigned int等类型的长度是( )
A. 固定的
B. 由用户自己定义的
C. 任意的
D. 与机器字的长度有关的
Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
A. to see
B. to be seen
C. seeing
D. Seen