如图所示是甲乙两种物质的质量和体积的关系图象,若用质量相等的甲、乙两种物质分别制成实心正方体A、B并排放在水平地面上,则A、B对地面的压强之比为() A . 8:1 B . 4:1 C . 4:3 D . 2:1 答案:B
-What a golden opportunity you missed! It means you’ll have to wait for another ten years.
-But I ________ to Beijing on business!
[ ]
A.
travel
B.
would travel
C.
was traveling
D.
have traveled