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【单选题】
迷走神经副交感纤维对心血管系统的主要作用是使:A.
心率减慢,传导加速
B.
心率减慢,传导减慢
C.
血管舒张,外阻力降低
D.
心室肌收缩力减弱,搏出量减少
E.
冠状动脉血流量减少
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【简答题】假如你让他待在你家,你就是在自找麻烦。 A. If you let him stay in your home, you are asking trouble. B. If you let him stay in your home, you are asking for trouble. C. If you let him to stay in your home, you are asking...
【单选题】—May I keep your company there? —You may_________.
A.
if you like
B.
as you like
C.
if you’d like
D.
if you like to
【单选题】_____, I think, and the problem can be settled.
A.
If you double your efforts
B.
If you make greater efforts
C.
If you spare no efforts
D.
Some more efforts
【单选题】You have to be patient if you want to sustain your position
A.
maintain
B.
better
C.
acquire
D.
support
【单选题】If your meal costs 5 dollars and if you. want to tip the waiter before you leave, you can pay the restaurant ______ dollars.
A.
5.5
B.
5
C.
6
D.
4
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