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【单选题】
Courvoisier征阳性的疾病最可能是（）A.
胆管上段癌
B.
胆管下段癌
C.
胆囊体癌
D.
胆囊底癌
E.
右肝内胆管癌
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皮皮学刷刷变学霸
举一反三
【单选题】The velocity of the wind,its steady direction,and the amount of time it has blown determines a wind driven current's
A.
____.
B.
temperature
C.
density
D.
deflection
E.
speed
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The surfaces of the tubes ar...
A.
10
B.
20
C.
40
D.
65
E.
15
F.
37.5
【单选题】The velocity of the wind,its steady direction,and the amount of time it has blown determines a wind driven current's ____.
A.
temperature
B.
density
C.
deflection
D.
speed
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The surfaces of the tubes ar...
A.
178.7
B.
53.2
C.
87.8
D.
128.5
E.
190
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The surfaces of the tubes ar...
A.
2.51
B.
0.0251
C.
2.59
D.
0.0259
E.
0.0255
F.
0.0293
【单选题】某单动往复栗 泵么活塞 直径为 4cm , 往复次数 为60次/min,冲程为1 5 cm , 该往复泵的理论流量为 ( ) L/min。
A.
11.3
B.
22.6
C.
678.2
D.
5.7
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