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【多选题】
实验室做化学实验,发生下列事故,处理方法不正确的是( )。A.
金属钠着火，用泡沫灭火器扑灭
B.
实验台上的酒精灯碰翻着火，立即用湿抹布扑灭
C.
乙醚着火时，应用石棉布或干砂扑灭
D.
汽油着火时，应用水扑灭
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【简答题】Spare the rod and spoil the child.
【简答题】Spare the rod and spoil the child.
【简答题】顶层边节点纵向钢筋弯折,当钢筋直径d不大于()mm时,弯折半径r=( )d;当钢筋直径d大于()mm时,弯折半径r=( )d(答案在课本88页)
【单选题】Corrective taxes that are imposed upon the producer of anasty smell can be successful in reducing that smell because the tax makes theproducer
A.
externalize the positive externality.
B.
externalize the negative externality.
C.
internalize the positive externality.
D.
internalize the negative externality.
【简答题】There is an old Chinese saying 'Spare the rod, spoil the child. '(孩子不打不成气) Write an article responding to the points raised and expressing your own views. You should write at least 150 words.