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【单选题】
辐射分为电离辐射和非电离辐射。下列辐射中，属于电离辐射的是（）。A.
紫外线
B.
激光
C.
a射线
D.
射频辐射
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反馈参考答案：
举一反三
【单选题】When can the passengers get their passports and luggage tags?
A.
On the first afternoon of the crusie
B.
On the last afternoon of the crusie
C.
At any time on board
D.
On the first evening of the crusie
【单选题】Passengers can get a breath-taking view when riding m a cable-car because 查看材料
A.
the ear is painted in eye-catching colours
B.
the car is suspended so high in the sky
C.
each car can seat up to six persons
D.
both the sky and the sea look beautifully blue
【单选题】How can passengers get to their cars?
A.
By city bus.
B.
By shuttle.
C.
By subway.
D.
By walking.
【单选题】The second paragraph suggests that______.
A.
passengers can have control over intrusive adverts
B.
passengers can customize the TV
C.
passengers can watch what they want, when they want
D.
passengers cannot get rid of intrusive commercials
【单选题】起重机联锁保护电路中,当电源供电电压较低时,因电磁拉力小,主接触器KM的静铁芯不能吸合动铁芯,故其主、副触点不能闭合,即不能合闸或工作时掉闸,从而可实现:
A.
零位保护
B.
过载保护
C.
短路保护
D.
欠压保护
【单选题】城市规划的组织编制与审批包括( )层次。
A.
城市社会、经济发展计划十区域规划、城市总体规划、城市详细规划五个层次
B.
区域规划、城镇体系规划、城市总体规划、城市详细规划四个层次
C.
城镇体系规划、城市总体规划、城市详细规划三个层次
D.
城市总体规划、城市详细规划两个层次
【单选题】Passengers can get a breath-taking view when riding in a cable car because _____
A.
the car is painted in eye-catching colours
B.
the ear is suspended so high in the sky
C.
each car can seat up to six persons
D.
both the sky and the sea look beautifully blue
【单选题】The passengers can get a bird’s—eye view because the car
A.
is painted in eye—catching colures．
B.
is suspended high in the air．
C.
seats up to six persons．
D.
looks SO tiny in the sky．
【简答题】审计计划包括( )和( )两个层次。
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