【单选题】电场力把单位正电荷从电场中的a点移到b点所作的功称为a、b两点间的 。
【简答题】根据对话内容,从方框中选出合适的句子补全对话,并将其标号填入相应的括号内。(满分10分) A. What do you want, madam? B. Do you like it , dear? C. I like red better than green, D. What can I do for you, madam? E. I prefer green. F. Here ...
【单选题】在电路中,电场力把单位正电荷从电场中的一点移到另一点所做的功,称为这两点间的( )。
【单选题】电场力把单位正电荷从电场中的a点移动到b点所作的功称为a、b两点间的( )。
【简答题】电场力把单位正电荷从电场中的 a 点移到 b 点所作的功称为 a 、 b 两点间的 _____ 电压的国际单位是 _____
【单选题】--What do you want to do next?We have half an hour until the baseball game. ----_____.Whatever you want to do is fine with me.
【单选题】听力原文:Sally, what do you think of the play? (2)
A.
It cost me twenty dollars.
B.
It was a waste of time.
C.
It took me three hours.
D.
It's time for dinner now.
【单选题】Grosch's law is no longer suitable because ______.
A.
the development in computer technology makes microcomputers very cheap
B.
people are not willing to pay twice as much in order to improve their machines, performance
C.
his law was put forward a long time ago and is outdated now
D.
a mainframe used to run faster than a CPU chip
【简答题】____是企业准备借助他人的力量,采取业务分包、购买保险等方式和适当的控制措施,将风险控制在风险承受度之内的策略。 A风险规避 B风险降低 C风险分担 D风险承受
【判断题】电场力将单位正电荷从电场中的a点移到b点所做的功,称其为a、b两点间的电压,电压是产生电流的根本原因。