造成一次电压降低、一次电流接近于零、二次电压高、二次电流为零的故障原因是()。
参考答案:高压整流变压器开路
选出与画线部分意思相同或相近的选项
1. Paul Jackson is a good actor.
A. funny
B. comedy
C. great
D. well
2. Do you want to go to see a movie?
A. see a movie
B. watch TV
C. see a comedy
D. go to watch TV
3. I like documentaries a lot.
A. a little
B. little
C. very much
D. very many
4. This new movie is very funny.
A. scary
B. exciting
C. interesting
D. relaxing
5. She often goes shopping on weekends.
A. on Saturday
B. on Sunday
C. on Saturday and Sunday
D. from Monday to Friday
The declaration of import goods shall be made to the Customs by the importer within ______ days from the date of the declaration of the arrival of the means of transport.
A.seven days B.fourteen daysC.fifteen days D.thirty days