一个长方体的长、宽、高都乘2,体积就乘( )
A.2
B.4
C.6
D.8
v=abh;a、b、h都扩大2倍;
v=2a×2b×2h;
v=8abh;
所以体积就扩大8倍;
故选D.
-Do you think it true that all the theories should ________ facts?
-I don't suppose so. If so, there would be no predictions(预言) [ ]
A. be made on
B. be based on
C. be set up with
D. be built with
下列器具不属于陶瓷制品的是( )
A.唐三彩
B.砂锅
C.蒸发皿
D.表面皿