— Where is my white model plane?
— ______________.
A:Sorry, I don't know
B:Yes, it is
C:No, it isn't
D:They are on the table
四六二十四
保障我国人民当家作主的根本政治制度是( )
几种物质的沸点(1标准大气压)
物质
沸点/℃
水
100
甘油
290
煤油
150
酒精
78