治疗肝火犯肺,灼伤肺络,咳嗽痰中带血,常以海蛤壳配伍的药物是()
A.瓜蒌
B.贝母
C.郁金
D.青黛
E.知母
参考答案:D
. Tom as well as his classmates __________ a song when the teacher came into the classroom.
A.are singing
B.were singing
C.is singing
D.was singing
ν≤120km/h时,相邻吊弦高差的标准值不大于()。
A、10mm
B、20mm
C、30mm
D、50mm