经煤炭科学研究总院鉴定,东滩煤矿3煤及3上、3下煤具有(),其顶底板具有弱冲击倾向。
参考答案:弱冲击倾向
—Could you tell me _____?
—By underground. [ ]
A. how did you come here
B. how you came here
C. when did you come here
D. when you came here
外感咳嗽与内伤咳嗽的鉴别要点有哪些?()
A.病程的长短
B.起病的缓急
C.咳嗽的多少
D.疾病的新久
E.属实属虚