教学用房的外墙与铁路的距离不应小于A.50米B.80米C.100米D.200米E.300米

含水率测定的方法繁多，如()。

A.烘箱法

B.电导法

C.化学法

D.蒸馏法

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！

与细菌耐药性有关的结构是

A、性菌毛

B、荚膜

C、质粒

D、鞭毛

E、异染颗粒

请帮忙给出正确答案和分析，谢谢！

阿里巴巴国际站的会员类型有()

A.买家

B.免费卖家

C.TrustPass member

D.Gold Supplier

疾病监测可以实现

A、了解疾病的现状

B、预测预报疾病

C、为卫生行政决策提供依据

D、控制疾病的发生

E、以上均是

请帮忙给出正确答案和分析，谢谢！

What happened in the 1950s？

A．Public television began to compete with other local stations.

B．Public television became successful in educational programs.

C．Public television became commercialized in America.

D．Public television got its legal status in American broadcasting business.

请帮忙给出正确答案和分析，谢谢！