【单选题】【消耗次数：1】
工业上制取环己烷是以（ ）为原料。
①
环己二烯
②
乙炔
③
苯
④
环己烯
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【多选题】
下列试剂中能用来鉴别1-氯环己烷和环己烯的有( )
①
Br2/H2O
②
KMnO4/H+
③
K2Cr2O7/H+
④
AgNO3/C2H5OH
⑤
浓HCl/ZnCl2
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would have
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should
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sign
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as well as; has experienced
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together with;experienced
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①
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no；not
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not；no
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【单选题】
我国规定管理的传染病分为
①
甲类1种、乙类23种、丙类11种
②
甲类2种、乙类25种、丙类10种
③
甲类3种、乙类28种、丙类9种
④
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