Sam __________ (遇见) Mary in England and visited her school.

[名词解释] SAM现象（systolic anterior motion.SAM）

[名词解释] SAM

[单选题]C．art: Hi,Mary, are you free tonight?Mary: _________. Cart?C．art: Shall we have a game of chess?A． What about itB． What of itC． What forD． What is it

[单选题]The earliest invasion of England is that by( )A.the IberianB.the DanesC.the

[单选题]The earliest invasion of England is that by( )A.the IberianB.the DanesC.the

[单选题]Mary's parents are worried about Mary because no one was aware ______ she had gone.A． of whereB． where thatC． the placeD． where of

[单选题]Is Mary there?- _________。A.Speaking.B.I'm not Mary.C.Who are you?D.Mary is

[名词解释] SAM征

[单选题,配伍题] SAM征（）A .二尖瓣脱垂B .二尖瓣狭窄C .大量心包积液D . D.肥厚型心肌病E .扩张型心肌病

[名词解释] SAM现象