一次性使用卫生用品应当离地、离墙存放不小于()厘米。
A、5
B、10
C、15
D、20
参考答案:B
—— Hello,Zhu Hua.I’ll have to return to Canada because I’ve worked here for a year.
—— _____!
A.What tim?flies
B.How time flies
C.What does time fly
D.How does time fly
诊断和改正程序中错误的工作通常称为_________。