心绞痛发作伴高血压宜选用
A．地高辛B．卡托普利C．美托洛尔D．硝苯地平E．硝酸甘油
参考答案：D
The teacher asked more _____ to prevent the students’ eyes from being injured.
A．to do
B．done
C．to be done
D．being done
倾斜长壁采煤法有哪些优缺点？适用于什么条件？
