关于二尖瓣狭窄最严重的并发症和主要死因是
A.大咯血
B.肺栓塞
C.肺部感染
D.急性肺水肿
E.感染性心内膜炎
参考答案:D
—Lucy hardly goes back to see her parents, _____________?
—__________. Instead, she chooses to write to them.
A.doesn’t she; No
B.does she; Yes
C.doesn’t she; Yes
D.does she; No
《诗经•氓》中运用的比兴诗句有()。
A.不见复关,泣涕涟涟
B.淇则有岸,隰则有泮
C.于嗟鸠矣,
D.其黄而陨
E.桑之落矣,其黄而陨