海平面在200米以下时,所覆盖地球的面积为总面积的()
A.0.7
B.0.6
C.0.5
D.0.3
参考答案:B
治疗寒性哮喘的首选方剂是
A.三拗汤 B.都气丸 C.大青龙汤 D.麻杏石甘汤合苏葶丸 E.小青龙汤合三子养亲汤
My family always have a party ______ the evening of October 1, and the party starts ______ 8. 00 p. m.
A.at; in
B.in; on
C.at; on
D.on; at