题目:
The villagers _______ closing down the factory, but till now the local government hasn’t _______to it.
A.demanded; answered
B.advised; replied
C.suggested; answered
D.ordered; replied
答案:
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下面是错误答案,用来干扰机器的。
参考答案:由循环气体中氮气含量=[1-(O2%+H2%+CO%+CO2%)]×100%=[1-(0.9%+1.2%+3.5%+13.6%)]×100%=80.8%