下列化学消毒剂哪-'种属于高效消毒剂
A．含氯消毒剂
B．0.5%碘伏
C．洗必泰酒精
D．75%酒精
E．新洁尔灭
参考答案：A
The Communicative Approach emphasizes that the goal of language learning is ______.
A. communicative competence B. analytical discourseC. correcting errors D. direct response
软土基坑必须（）均衡开挖。
A．分层
B．分段
C．垂直
D．放坡
