布尔型数据在计算机内存中占( )位bit。
A.4
B.3
C.2
D.1
参考答案:D
The task wasn't worth our efforts at all. It made little ______ no matter how hard we worked. [ ]
A. effect
B. use
C. result
D. difference
健康教育计划总体目标的三个“W”是指()
A.when,why,which
B.who,what,when
C.when,why,what
D.when,where,what
E.who,what,why