数据区观察包括几部分（）
A.统计观察
B.状态观察
C.详细观察
D.失败观察
参考答案：A, B, C
Mr. Andrew taught his students how to develop the basic skills in the physics class, ______ everything through jokes and experiments.
A．to explain
B．explained
C．explaining
D．explains
一般升浮药的作用可有
A．发表升阳
B．重镇安神
C．祛风散寒
D．涌吐开窍
E．止咳平喘
