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【单选题】
亚音速气流流经收敛型管道时，静压（ ）A.
减少
B.
增加
C.
保持不变
D.
与温度成反比
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举一反三
【单选题】The correct description of the aorta is ()
A.
Part of aortic arch root goes out of left and right coronary arteries
B.
The aorta continues to separate the main trunk of brachiocephalic artery
C.
The following sequence of the aorta is thoracic aorta → abdominal aorta → internal iliac artery and external iliac artery → middle recommended artery → middle caudal artery
D.
All of the above
E.
Aortic regurgitation with atrium
【单选题】Can you tell me ___________?
A.
what to keep fit
B.
how to keep fit
C.
keeping fit
D.
to keep fit
【单选题】The aorta can keep relatively stable in the cardiac cycle, the main reason is that the large artery ( )
A.
Has a high level of blood pressure.
B.
Has a fast velocity.
C.
Has a small blood resistance.
D.
Has thick vessel walls.
E.
Has dilatancy and elasticity.
【单选题】W： How long can I keep the book? M：______________
A.
Yes. You can keep it.
B.
No. I’m afraid you should return it now.
C.
Three weeks. But you can renew it if you need it for a longer time.
D.
You can take it at any time you want.
【简答题】333333333333
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