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【单选题】
消防头盔头盔在260℃±5℃环境中放置5min后，帽壳后沿变形下垂不超过（）mm。
A.
22.0
B.
33.0
C.
40.0
D.
11.0
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Questions 36～40 are based on the following passage.Richard Satava, program manager for advanced medical technologies, has been a driving force in bringing virtual reality to medicine, where computers ...
A.
will enable surgeons to be physically present on every battlefield
B.
can raise the spirits of soldiers wounded on the battlefield
C.
will greatly improve medical conditions on the battlefield
D.
can shorten the time for operations on soldiers wounded on the battlefield
【单选题】In Paris, a popular new bike rental program called Velib (a slang combination of the French words velo, for bike, and liberty, for liberty) was introduced. (1) The bikes, which are available from over...
A.
be a good example illustrating the popularity of Velibs
B.
show that people always find excuses when they are late
C.
urge the city government to put more bikes into the program
D.
reveal a case of complaint people have about Velib
【单选题】In Paris, a popular new bike rental program called Velib (a slang combination of the French words velo, for bike, and liberty, for liberty) was introduced. (1) The bikes, which are available from over...
A.
There are about 1,421 stations in Paris and Lyon
B.
If you rent a bike for 2 hours, you need to pay 6 euros
C.
If you pay 29 euros, you can use the bikes any time around the year
D.
You cannot return the bike to the station from which you rent it
相关题目：
【单选题】消防头盔主要由 个部分组成。
A.
14
B.
13
C.
12
D.
15
【单选题】Questions 36～40 are based on the following passage.Richard Satava, program manager for advanced medical technologies, has been a driving force in bringing virtual reality to medicine, where computers ...
A.
will enable surgeons to be physically present on every battlefield
B.
can raise the spirits of soldiers wounded on the battlefield
C.
will greatly improve medical conditions on the battlefield
D.
can shorten the time for operations on soldiers wounded on the battlefield
【单选题】下列各式从左到右的变形正确的是（ ）
A.
ba=b2a2
B.
ba+b=11+b
C.
a2-b2a-b=a-b
D.
a+b(a+b)(c+d)=1c+d
【单选题】金属材料受外力作用产生变形而不破坏的能力称为（）.
A.
弹性
B.
塑性
C.
韧性
【判断题】桥梁变形监测的精度，应根据桥梁的类型、结构、用途等因素综合确定。
A.
正确
B.
错误
【单选题】消防头盔头盔在260℃±5℃环境中放置5min后，帽壳后沿变形下垂不超过（）mm。
A.
22.0
B.
33.0
C.
40.0
D.
11.0
【单选题】基托发生变形的原因不包括
A.
装盒压力过大
B.
装盒压力不足
C.
基托厚薄差异过大
D.
冷却过快
E.
升温过快
【单选题】In Paris, a popular new bike rental program called Velib (a slang combination of the French words velo, for bike, and liberty, for liberty) was introduced. (1) The bikes, which are available from over...
A.
be a good example illustrating the popularity of Velibs
B.
show that people always find excuses when they are late
C.
urge the city government to put more bikes into the program
D.
reveal a case of complaint people have about Velib
【单选题】消防头盔面罩具有良好的( )。
A.
防热性
B.
透光率
C.
防毒性
D.
防烟性
【单选题】消防头盔电绝缘性能交流电2200V，耐压（），帽壳泄漏电流不超过3mA。
A.
1min
B.
2min
C.
3min
D.
4mi
【多选题】引起视物变形的疾病有（）
A.
虹膜后粘连
B.
视网膜脱离
C.
中心性浆液性视网膜脉络膜病变
D.
青光眼
E.
老年性黄斑变性
【单选题】In Paris, a popular new bike rental program called Velib (a slang combination of the French words velo, for bike, and liberty, for liberty) was introduced. (1) The bikes, which are available from over...
A.
There are about 1,421 stations in Paris and Lyon
B.
If you rent a bike for 2 hours, you need to pay 6 euros
C.
If you pay 29 euros, you can use the bikes any time around the year
D.
You cannot return the bike to the station from which you rent it