罐车用装卸管接头有法兰、螺纹接头和卡式快速接头三种结构形式。
参考答案：对
On the contrary,I think it is Tom, you, to blame.
A．more than; are
B．less than; who are
C．rather than; that is
D．rather than;is
浮力的公式：______，V排表示物体______的体积．浮力的大小仅与______和______有关，而与物体浸没后在液体内的深度______关．
