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【单选题】
双层管线渗漏检测仪检测到油或者水进入双层罐夹层,系统将处于报警工作状态,该传感器的指示灯为()常亮,蜂鸣器报警。
A.
红色
B.
黄色
C.
蓝色
D.
绿色
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, ho...
A.
How to render automobiles pollution-free.
B.
How to make smaller and safer automobiles.
C.
How to solve the problem of traffic jams.
D.
How to develop an automated subway system.