皮皮学，免费搜题
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搜题
【单选题】
大动脉最主要的特点是:
A.
内弹性膜明显
B.
有明显的内膜
C.
中膜厚
D.
中膜以弹性膜为主
E.
外膜为结缔组织
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举一反三
【判断题】洪涝灾害是在建国以前我国面临最大的，也是造成伤亡人数最多的自然灾害。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】肾脏疾病时，排出大量蛋白质，导致水肿，其原因是
A.
毛细血管血压升高
B.
血浆胶体渗透压降低
C.
毛细血管血压降低
D.
毛细血管通透性增加
查看完整题目与答案
【单选题】Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?
A.
Plugged injector nozzles
B.
Excessive fuel injection
C.
Very late injection timing
D.
Incorrect crankshaft clearance
查看完整题目与答案
【单选题】Most hydraulic steering gears are fitted with relief valves which .
A.
function when the rudder is amidships
B.
relieve excess whip pressure from the hydraulic oil system
C.
protect the piping assembly from external rudder shock
D.
relieve excessive telemotor pressure
查看完整题目与答案
【单选题】Cargo pump relief valves are piped to the ______．
A.
cargo pump pressure gauges
B.
crossover lines interconnecting two pumps
C.
suction side of pumps
D.
atmosphere through pump vents
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【单选题】在电感元件的正弦交流电路中,若电压的有效值一定,则当频率增大时,电流将( )。
A.
增大
B.
减小
C.
不变
D.
不确定
查看完整题目与答案
【单选题】Blow-off of the relief valves of the engines cylinders may be caused by _____.
A.
too low lead
B.
water in fuel
C.
too tight spring
D.
leakage
查看完整题目与答案
【简答题】变频器参数设置中,P4表示( )P5表示( )P6表示( )
查看完整题目与答案
【单选题】What is the purpose of pressure-vacuum relief valves ________．
A.
Regulation of discharge pressure from cargo pumps
B.
Maintaining constant velocity in cargo lines
C.
Regulation of suction head on cargo pumps
D.
To maintain a tank or void at atmospheric pressure
查看完整题目与答案
【判断题】Relief valves are used for gases; safety valves are used for liquids.
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【判断题】洪涝灾害是在建国以前我国面临最大的，也是造成伤亡人数最多的自然灾害。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】肾脏疾病时，排出大量蛋白质，导致水肿，其原因是
A.
毛细血管血压升高
B.
血浆胶体渗透压降低
C.
毛细血管血压降低
D.
毛细血管通透性增加
查看完整题目与答案
【单选题】Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?
A.
Plugged injector nozzles
B.
Excessive fuel injection
C.
Very late injection timing
D.
Incorrect crankshaft clearance
查看完整题目与答案
【单选题】Most hydraulic steering gears are fitted with relief valves which .
A.
function when the rudder is amidships
B.
relieve excess whip pressure from the hydraulic oil system
C.
protect the piping assembly from external rudder shock
D.
relieve excessive telemotor pressure
查看完整题目与答案
【单选题】Cargo pump relief valves are piped to the ______．
A.
cargo pump pressure gauges
B.
crossover lines interconnecting two pumps
C.
suction side of pumps
D.
atmosphere through pump vents
查看完整题目与答案
【单选题】在电感元件的正弦交流电路中,若电压的有效值一定,则当频率增大时,电流将( )。
A.
增大
B.
减小
C.
不变
D.
不确定
查看完整题目与答案
【单选题】Blow-off of the relief valves of the engines cylinders may be caused by _____.
A.
too low lead
B.
water in fuel
C.
too tight spring
D.
leakage
查看完整题目与答案
【简答题】变频器参数设置中,P4表示( )P5表示( )P6表示( )
查看完整题目与答案
【单选题】What is the purpose of pressure-vacuum relief valves ________．
A.
Regulation of discharge pressure from cargo pumps
B.
Maintaining constant velocity in cargo lines
C.
Regulation of suction head on cargo pumps
D.
To maintain a tank or void at atmospheric pressure
查看完整题目与答案
【判断题】Relief valves are used for gases; safety valves are used for liquids.
A.
正确
B.
错误
查看完整题目与答案