煤巷掘进面防突措施深孔松动爆破中,钻孔应布置在工作面的上方与中部,能使巷道周边()m以内处于深孔松动爆破的影响范围内。
A、2
B、3
C、4
参考答案:A
患者,男,4岁,声嘶、犬吠样咳嗽3天,咽喉部可见灰白色白膜,最可能的诊断为()
A.喉结核
B.喉白喉
C.急性喉炎
D.喉真菌病
E.以上均不正确
— Did you hear the news this morning?
— Oh, yes, _______ was announced on the radio has caused great excitement among the students.
A.that
B.what
C.as
D.it