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【多选题】
中国的 2.4GHz 标准共有( )个频段,互不重叠的频段有( )个。A.
11 个
B.
13 个
C.
3 个
D.
5 个
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反馈参考答案：
举一反三
【判断题】A task doesn’t require the group, or pair, to achieve an objective that is usually expressed by an observable result.
A.
正确
B.
错误
【简答题】Laptop computers are popular all over the world. People use them on trains and airplanes, in airports and hotels. These laptops connect people to their workplace. In the United States today, laptops a...
【简答题】私の夢は世界旅行をする( )です。
【简答题】阅读理解。 Laptop computers are popular all over the world. People use them on trains and airplanes, in airports and hotels. These laptops connect people to their workplace. In the United States today, lap...
【简答题】倒闸操作必须根据值班调度员或值班负责人的命令执行。属上级值班员（），应按上级值班员的命令执行。在发布倒闸操作命令前，应按（）检查操作程序，保证其正确，受令人复诵无误后执行。
【单选题】The task requires _______ patience and endurance.
A.
extraordinary
B.
extreme
C.
extra
D.
continual
【简答题】Laptop computers are popular all over the world. People use them on trains and airplanes, in airports and hotels. These laptops connect people to their workplace. In the United States today, laptops a...
【单选题】灾害天气行车流程顺序正确的为: 1司机作出反应;2列车调度员登记;3发布调度命令;4接到报警信号;5司机接到命令
A.
1、2、3、4、5
B.
3、2、1、4、5
C.
4、2、3、5、1
D.
4、3、5、2、1
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