煤矿窄轨质量评定分为()。
A、合格
B、良好
C、优良
D、不合格
参考答案:A, C, D
— Honestly, there are too many people who pretend to be beggars to cheat the passers-by.
— That’s true. ________ I see the young and strong beggars, I will pay no attention.
A.Unless
B.Whether
C.As long as
D.As far as
计算机病毒防治产品实行销售许可证制度