-How many sandwiches did you eat?
-I ate____________ [ ]
A. one
B. two
C.three
答案:B
Don’t be shocked if you realize a man ____ is actually a millionaire. Rich people are weird.
A.in rags
B.in ruins
C.in advance
D.in addition
低压安全供电的三大保护有:接地保护、漏电保护、电压保护。