【单选题】Never is one supposed to do exterior painting when ,the temperature is below 50 degrees F.
【判断题】The excerpts boast numerous characters. ( )
【判断题】( )低压小接地电流的接地电阻应大于4?,小于10?。
【简答题】Listen to the four short excerpts and match them with the correct telegraphic notes below. Write the numbers in the boxes.