在酷热气候中为降低筏内温度应将（）
A、筏底放气
B、上浮胎放气
C、下浮胎放气
参考答案：A
---The thread of my kite broke and it flew away.
---I told you it would easily break _____ was the weakest.
A．where
B．the place where
C．for it
D．where it
出膛的炮弹能继续向前是因为______，炮弹逐渐改变方向落向地面是因为______，在草地上滚动的足球越滚越慢是因为______．
