下列哪种情况下，烟气蔓延速度最慢（）
A、垂直蔓延
B、水平蔓延
C、跳跃性发展
D、爆炸性发展
参考答案：B
--- The football game was not interesting, was it?
---_____. Even John, who _____ to the super fans, didn’t enjoy it.
A．Yes, is belonged
B．No, is belonged
C．Yes, belongs
D．No, belongs
明细分类账
