解决农牧民能源问题的途径有①营造薪炭林②兴建沼气池③推广省柴灶④燃烧秸秆杂草 [ ]
A、①②③
B、②③④
C、①③④
D、①②④
答案：A
240. It is an important problem. You should ________ before you draw a conclusion.
A．think about
B．think it over
C．think of it
D．think over it
退伙的原因
