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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】Q345和Q245钢法兰在下列任一情况下应经正火热处理：（）
A.
法兰断面厚度大于50mm
B.
法兰断面厚度大于60mm
C.
锻制法兰
D.
带颈法兰（热轧或锻制）
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, ually he will be swingirg.quite high. The ...
A.
if the engine moves too fast
B.
if the engine’s amplitude increases
C.
if a tire gets out of balance
D.
if damage occurs in the engine
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, ually he will be swingirg.quite high. The ...
A.
the speed of a motor in revolutions
B.
the frequency at which a motor vibrates
C.
the amplitude of an engine that oscillates
D.
the changes in a dial within a ear engine
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, ually he will be swingirg.quite high. The ...
A.
vibrate
B.
resonate
C.
swing
D.
oscillate
【单选题】三角形内角和等于180°，但在凹凸面上三角形内角和却小于或大于180°。这表明真理具有（ ） ①客观性 ②条件性 ③物质性 ④具体性
A.
①②
B.
②④
C.
①③
D.
③④
相关题目：
【单选题】凹凸面对焊钢法兰凸出部分的直径小于凹下部分的直径()
A.
1mm
B.
2mm
C.
3mm
D.
4mm
【多选题】Q345和Q245钢法兰在下列任一情况下应经正火热处理：（）
A.
法兰断面厚度大于50mm
B.
法兰断面厚度大于60mm
C.
锻制法兰
D.
带颈法兰（热轧或锻制）
【判断题】中低压法兰密封面可采用平面、凹凸面、榫槽面等形式。
A.
正确
B.
错误
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, ually he will be swingirg.quite high. The ...
A.
if the engine moves too fast
B.
if the engine’s amplitude increases
C.
if a tire gets out of balance
D.
if damage occurs in the engine
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, ually he will be swingirg.quite high. The ...
A.
the speed of a motor in revolutions
B.
the frequency at which a motor vibrates
C.
the amplitude of an engine that oscillates
D.
the changes in a dial within a ear engine
【判断题】精准量房中,建筑细节测量 主要是墙体凹凸面以及建筑层高的测量。
A.
正确
B.
错误
【单选题】根据川维化工盲板抽堵作业安全管理规定，盲板应至少有（ ）个手柄（凹凸面法兰加设盲板除外），便于抽堵、辨识及挂牌。
A.
一
B.
二
C.
三
D.
四
【多选题】某个阀门连接密封面为凹凸面，代表符号为（）。
A.
FM
B.
M
C.
MFM
D.
RF
【判断题】一般情况下，压力低的管线选用平面法兰，压力高的管线选用凹凸面法兰。
A.
正确
B.
错误
【单选题】按规定，不锈钢法兰使用的非金属垫片，其氯离子含量不得超过（ ）。
A.
20×10-6
B.
30×10-6
C.
40×10-6
D.
50×10-6
【单选题】三角形内角和等于180°，但在凹凸面上三角形内角和却小于或大于180°。这表明真理具有（ ） ①客观性 ②条件性 ③物质性 ④具体性
A.
①②
B.
②④
C.
①③
D.
③④