【简答题】一个电容元件,其电容量为 2000 m F 。当电容两端的电压为 10V 时存储的电能为多少?当两端的电压为 20V 时,存储的电能又为多少?
【判断题】.在决定创业之前,应该看看自己是否有创业的素质、技能和物质条件。
【单选题】在决定创业之前,应该看看自己是否( )创业的素质.技能和物质条件
【判断题】“十三五”规划中,“三改一整”工程的意思是“改厨、改厕、改客房、整理院落”。
【单选题】W hat is the major contribution of Luyu ( 陆羽 )?
A.
He discovered the medical use of tea.
B.
He began the use of tea as a recreational drink.
C.
He wrote the book The Classic of Tea .
D.
He made tea an official drink.