【单选题】What is Sustainable World Travel?
A.
An energy-saving organization.
B.
A group of environmentalists.
D.
A group of local residents involved in making decisions about travel.
【判断题】晶闸管调速电路常见故障中,电动机M的转速调不上去,可能是三极管V35,V37击穿。
【判断题】晶闸管调速电路常见故障中,电动机M的转速的转速调不下来,可能是给定信号的电压不够。
【判断题】晶闸管调速电路常见故障中,电动机M的转速调不下来,可能是给定信号的电压不够。
【判断题】晶闸管调速电路常见故障中,电动机M的转速调不下来,可能是给定信号的电压不够。
【单选题】What is sustainable architecture?
A.
architecture that uses traditional methods to build modern buildings
B.
architecture that tries not to harm the environment
C.
architecture that uses a lot of different materials
【简答题】Read the questions. Listen to the passage and write the answers to the questions. What is unusual about World Sustainable travel? What kind of people are likely to work at Sustainable World Travel. Wh...
【判断题】测量设备绝缘电阻前应 检查被测电气设备和电路,看是否已全部切断电源。绝对不允许设备和线路带电时用兆欧表去测量。 ( )
【单选题】What is sustainable tourism?
A.
It makes a low impact on the enviroment and local culture.
B.
It generates income and employment.
C.
It creats an important source of tax revenue.
D.
It makes little influence on domestic tourist markets.