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【单选题】
PLC输出模块故障包括( )。A.
输出模块LED指示灯不亮
B.
输出模块LED指示灯不熄灭
C.
输出模块没有电压
D.
以上都是
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【单选题】Which campaign line for energy conservation is more effective?
A.
If you do not use energy conservation methods, you will lose $350 per year.
B.
If you use energy conservation methods, you will save $350 per year.
C.
The two lines are the same, so they will have the same effect on people.
【简答题】Energy conservation and is the nature of the energy.
【单选题】Which of the following is an economical measure for energy conservation?
A.
Investing in new forms of facilities.
B.
Making more efficient refrigerators.
C.
Requiring white roofs for buildings.
D.
Toughening fuel economy standards.
【单选题】Discouraging the use of plastic belongs to the second type of energy conservation.
A.
Y
B.
N
C.
NG
【单选题】Why are subterranean buildings good for energy conservation?
A.
Because they use solar energy.
B.
Because they don't need central heating.
C.
Because the temperature there remains constant.
D.
Because they don't need air-conditioning.
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