What are the actual results of this research?
AlphaGo beat top computer Go programs.
B. AlphaGo beat the legendary Lee Sedol.
C. AlphaGo beat European Go champion Fan Hui.
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The four essential arts required of any true Chinese scholar refer to music, chess, calligraphy and painting.
A. 对
B. 错
Process description makes use of imperative sentences and the past tense.
A. 对
B. 错
实验室和工业上常用的有机溶剂萃取剂，易挥发，不燃烧，常用作冷冻剂和灭火剂是化合物是（）
A. 氯仿
B. 二氯甲烷
C. 甲烷
D. 四氯化碳
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