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【单选题】
He was beaten by his father because of being naughty. ____, he became silent.A.
Since
B.
Since then on
C.
From that time on
D.
From since on
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【单选题】I smoke out of ____ habit, not for ____ pleasure; for I have been in the habit for twenty years.
A.
a; the
B.
the; a
C.
x; the
D.
x; x
【单选题】The crowd backed away to let the wounded man pass ___ .
A.
down
B.
through
C.
off
D.
away
【单选题】房室交界处传导速度较慢的生理意义在于 房室交界处传导速度较慢
A.
有效防止出现期前收缩
B.
有利于心房或心室同步收缩
C.
有利于心室充盈和射血的交替
D.
有效避免出现完全强直收缩
【单选题】I smoke out of ____ habit, not for ____ pleasure, and I have had this habit for twenty years. [ ]
A.
a; the
B.
the; a
C.
/; the
D.
/; /
【单选题】房室交界处传导速度较慢的生理意义是
A.
有利于增加心肌收缩能力
B.
有利于心房或心室同步收缩
C.
有利于心室充盈和射血的交替
D.
有利于避免出现完全强直收缩
E.
有效防止期前收缩
【单选题】房室交界传导速度较慢的生理意义是
A.
有利于增强心肌收缩能力
B.
有利于心房或心室同步收缩
C.
心房收缩在前,心室收缩在后,有利于心室充盈
D.
有效避免出现完全强直收缩
E.
有利于避免心肌收缩力过强
【单选题】I smoke out of ______ habit, not for ______ pleasure; for I have been in the habit for more than twenty years．
A.
the; a
B.
不填; the
C.
a: the
D.
不填; 不填
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