要计算物质量，就需要知道物体的（）。
A、形状
B、体积
C、尺寸
参考答案：B
--- Could you bring me that novel you _____________ me about when I dropped in on you?
--- Sorry, I can’t. I have given it to a friend.
A．told
B．would tell
C．had told
D．had been telling
叶螨一年发生24～32代，世代重叠，
