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【单选题】
图示电路中,欲使 I 1 = I /4,则 R 1 、 R 2 的关系式为______。
A.
R 1 = R 2 /3
B.
R 1 =4 R 2
C.
R 1 = R 2 /4
D.
R 1 =3 R 2
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举一反三
【单选题】Which system(s) in the hydraulic systems of crane always hold(s) single side of load?
A.
hoisting system only
B.
hoisting system and luffing system
C.
hoisting system and slew and slewing system
D.
slewing system only
查看完整题目与答案
【单选题】For a balanced three-phase △ -connected load, the average power absorbed by the load is P . Change the △ -connected load to Y-connected load, the power will :
A.
remain the same
B.
increase to P
C.
increase to P
D.
increase to 3 P
查看完整题目与答案
【单选题】The slender column is under axial compressive load P, the critical load 【图片】is independent of ( ).
A.
the material of the column
B.
the length of the column
C.
the magnitude of the P
D.
the shape and dimension of the cross section of the column
查看完整题目与答案
【单选题】The vessel’s load line certificate is always issued by ____.
A.
The register of shipping
B.
custom house
C.
cargo survey bureau
D.
maritime safety administration
查看完整题目与答案
【单选题】One should always be careful with _ (load) guns.
A.
loading
B.
loaded
查看完整题目与答案
【单选题】The vessel’s load line certificate is always issued by ____.
A.
the register of shipping
B.
custom house
C.
cargo survey bureau
D.
maritime safety administration
查看完整题目与答案
【单选题】The load on the crosshead pin is always ______, so it is the ______ half of the bearing which is subject to wear.
A.
upwards / top
B.
upwards / bottom
C.
downwards / top
D.
downwards / bottom
查看完整题目与答案
【判断题】生长的最适温度是指生长最快的温度，对健壮生长来说，也是最适宜的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列关于胫前动脉和足背动脉的描述,错误的是
A.
压迫胫前动脉，其止血的范围是整个足部
B.
胫前动脉发自腘动脉
C.
胫前动脉的血供范围是小腿前群肌
D.
其体表投影为：胫骨粗隆与腓骨小头连线中点至足背内、外踝连线的中点为胫前动脉；自足背内、外踝连线中点至第1、2跖趾关节间的连线为足背动脉
E.
在内、外踝连线中点向深部压迫足背动脉，可止血
查看完整题目与答案
【单选题】The vessel’s Load Line Certificate is always issued by （）.
A.
The Register of Shipping
B.
Customs House
C.
Cargo Survey Bureau
D.
Maritime Safety Administration
查看完整题目与答案
相关题目：
【单选题】Which system(s) in the hydraulic systems of crane always hold(s) single side of load?
A.
hoisting system only
B.
hoisting system and luffing system
C.
hoisting system and slew and slewing system
D.
slewing system only
查看完整题目与答案
【单选题】For a balanced three-phase △ -connected load, the average power absorbed by the load is P . Change the △ -connected load to Y-connected load, the power will :
A.
remain the same
B.
increase to P
C.
increase to P
D.
increase to 3 P
查看完整题目与答案
【单选题】The slender column is under axial compressive load P, the critical load 【图片】is independent of ( ).
A.
the material of the column
B.
the length of the column
C.
the magnitude of the P
D.
the shape and dimension of the cross section of the column
查看完整题目与答案
【单选题】The vessel’s load line certificate is always issued by ____.
A.
The register of shipping
B.
custom house
C.
cargo survey bureau
D.
maritime safety administration
查看完整题目与答案
【单选题】One should always be careful with _ (load) guns.
A.
loading
B.
loaded
查看完整题目与答案
【单选题】The vessel’s load line certificate is always issued by ____.
A.
the register of shipping
B.
custom house
C.
cargo survey bureau
D.
maritime safety administration
查看完整题目与答案
【单选题】The load on the crosshead pin is always ______, so it is the ______ half of the bearing which is subject to wear.
A.
upwards / top
B.
upwards / bottom
C.
downwards / top
D.
downwards / bottom
查看完整题目与答案
【判断题】生长的最适温度是指生长最快的温度，对健壮生长来说，也是最适宜的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列关于胫前动脉和足背动脉的描述,错误的是
A.
压迫胫前动脉，其止血的范围是整个足部
B.
胫前动脉发自腘动脉
C.
胫前动脉的血供范围是小腿前群肌
D.
其体表投影为：胫骨粗隆与腓骨小头连线中点至足背内、外踝连线的中点为胫前动脉；自足背内、外踝连线中点至第1、2跖趾关节间的连线为足背动脉
E.
在内、外踝连线中点向深部压迫足背动脉，可止血
查看完整题目与答案
【单选题】The vessel’s Load Line Certificate is always issued by （）.
A.
The Register of Shipping
B.
Customs House
C.
Cargo Survey Bureau
D.
Maritime Safety Administration
查看完整题目与答案