“一通三防”的内容是什么？
参考答案：
“一通”就是做好矿井通风管理，“三防”就是防止矿井瓦斯、粉尘爆炸和火灾的发生。
34．I don’t say I am against their plan. But the trouble is _________ they do doesn’t agree with what they say.
A．what that
B．that what
C．that whether
D．what if
滨海（shore）
