做功：生热
A．冬天：寒流
B．台风：灾难
C．高薪：养廉
D．位高：权重
参考答案：B
解析： 因果关系。固做功而生热，因台风而导致灾难。
It was the training _____ he had as a young man _____ made him such a good engineer. [ ]
A. what; that
B. that; which
C. which; that
D. that; what
燃烧时排放于大气的污染物主要是指（）。
A、CO、CO2
B、CO、SO2
C、NO、NO2
