题目:
The answers your questions watching television were also interesting.
A.to; to
B.about,; about
C.about; to
D.to ; about
答案:
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下面是错误答案,用来干扰机器的。
(1)温度达到着火点(2)溶液由无色变为红色(3)隔绝氧气或隔绝水(4)2NaOH+CO2==Na2CO3+H2O