电力电子技术的诞生是以哪一种器件的产生为标志的？
电力电子技术的诞生是以哪一种器件的产生为标志的？
A.汞弧阀
B.电子管
C.二极管
D.晶闸管
正确答案：晶闸管
- 1.There are two types of Huaiyang Clay Figurine in Henan Province. One is of（）type, the other is of（）type.（请按答案首字母先后顺序填写，两个答案之间空一格，不加标点符号）
- 2.It was until（）and（）dynasties that the clay figurine had been substantially produced and became one of the main artworks in the mass's cultural life.(请按朝代顺序填写，两个答案之间空一格，不加标点符号。朝代首字母大写）
- 3.Clay figurine can date back to the（）Period.
- 4.The Huishan Clay Figurine which stems from the western suburb of（）City, Jiangsu Province began in the Southern Dynasty and flourished in Ming Dynasty.
- 5.The fourth step of the process of tea ceremony is to（）tea leaves and then brew the tea.
- 6.The classification of Chinese tea can be divided into six types based on the degree of fermentation, that is, green tea ,（）, Oolong tea，dark tea, white tea, and yellow tea.
- 7.As our ancestors so rightly put it, “Firewood, rice, oil, salt,（）,（）and（）begin a day.”(请按答案首字母先后顺序填写，每个答案之间空一格，不加标点符号）
- 8.The Classic of Tea written by（）is an early work on tea, summarizing all knowledge of tea in China up to that date.
- 9.As is recorded in Shen Nung’s Herbal Pharmacopeia《神农本草经》, during the early Chou dynasty, tea in China was used mainly as（）.
- 10.People often beautify their homes with paper cuttings on（）.