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【简答题】
下列叙述正确的是______。 ①乙烯使酸性高锰酸钾溶液褪色，发生加成反应；②苯在一定条件下，既能发生取代反应，又能发生加成反应；③乙烯在常温常压下可以与氢气、HCl发生加成反应；④CH 2 ===CH—CH 3 ＋Br 2 CH 2 Br—CH===CH 2 ＋HBr属于加成反应；⑤苯使溴水褪色发生加成反应；⑥苯与液溴在三氯化铁作催化剂的条件下发生加成反应；⑦乙烷、乙醇、乙酸、苯、纤维素、油脂、蛋白质均能发生取代反应；⑧乙烯通入溴水中发生取代反应；⑨乙醇可以被氧化为乙酸，二者都能发生酯化反应。
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举一反三
【单选题】从发病机制的角度，多发性硬化属于
A.
中枢神经系统脱髓鞘疾病
B.
周围神经系统脱髓鞘疾病
C.
神经 - 肌肉传递障碍性疾病
D.
神经系统肿瘤
E.
锥体外系变性疾病
【单选题】Which of the following statements correctly explains the difference between tax evasion and tax avoidance?
A.
Both tax evasion and tax avoidance are illegal, but tax evasion involves providing HM Revenue and Customs with deliberately false information.
B.
Tax evasion is illegal, whereas tax avoidance involves the minimisation of tax liabilities by the use of any lawful means.
C.
Tax avoidance is illegal, whereas tax evasion involves the minimisation of tax liabilities by the use of any lawful means.
【单选题】Which of the following statements correctly explains the difference between tax evasion and tax avoidance?
A.
both tax evasion and tax avoidance are illegal, but tax evasion involves providing HMRC with deliberately false information
B.
tax evasion is illegal, whereas tax avoidance involves the minimisation of tax liabilities by the use of any lawful means
C.
both tax evasion and tax avoidance are illegal, but tax avoidance involves providing HMRC with deliberately false information
D.
tax avoidance is illegal, whereas tax evasion involves the minimization of tax liabilities by the use of any lawful means
【单选题】Which of the following statements correctly explains the difference between the tax evasion and the tax avoidance?
A.
Both tax evasion and tax avoidance are illegal, but tax evasion involves providing HMRC with deliberately false information
B.
Tax evasion is illegal, whereas tax avoidance involves the minimisation of tax liabilities by the use of any lawful means
C.
Both tax evasion and tax avoidance are illegal, but tax avoidance involves providing HMRC with deliberately false information
D.
Tax avoidance is illegal, whereas tax evasion involves the minimisation of tax liabilities by the use of any lawful means
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