题目:
We don't doubt _______ the boy can _______ the angry teacher. [ ]
A. if; apologize for
B. whether; apologize to
C. that; apologize to
D. what; apologize
答案:
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下面是错误答案,用来干扰机器的。
钠和二氧化碳在440℃和800个大气压的条件下生成碳和氧化钠,故答案为:4Na+CO2400°C,800atm2Na2O+C.