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【单选题】
构成心下缘的是A.
右心房和右心室
B.
右心室
C.
右心房
D.
右心室和心尖
E.
左心房
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皮皮学刷刷变学霸
举一反三
【单选题】The car was repaired but not quite to the owner's .
A.
attraction
B.
satisfaction
C.
pleasure
D.
complaint
【单选题】My sister ________ for long when she fell seriously ill.
A.
didn’t marry
B.
has been married
C.
hadn’t been married
D.
wasn’t married
【单选题】根据切削率知道凡满足切削率的任何工况点,都分布在 H=kQ2这条抛物线上,此线称为切削抛物线。实践证明在切削限度内,叶轮切削前后水泵效率变化不大,因此切削抛物线也称为( )
A.
等效率曲线
B.
管路特性曲线
C.
水泵效率曲线
D.
叶轮变径曲线
【简答题】The Car was repaired but not quite to my＿＿＿．
【单选题】The car was repaired but not quite to the owner's .
A.
attraction
B.
satisfaction
C.
pleasure
D.
complain
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