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decide whether the following translations are true or false. many scientists have been

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By "alcohol is a dietary Jekyll and Hyde"(Line 1,Paragraph 4), the author means______.

A. drinking alcohol can be of both advantage and disadvantage
B. alcohol is necessary for daily diet
C. Jekyll and Hyde is a brand of alcohol
D. drinking alcohol can also be very dangerous

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decide whether the following translations are true or false. as for gaps in the fossil

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decide whether the following translations are true or false. colleges flood the postal systems with news of who has won a place in next fall’s freshman class. 译文：美国的邮政部门将被雪片般的大学录取通知书所淹没。()

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下列哪种溶液的浓度与C(H2SO4)0.1mol/L的浓度相等？()

A. C(1/2H2SO4)0.2mol/L溶液
B. C(1/2H2SO4)0.1mol/L溶液
C(1/2H2SO4)0.05mol/L溶液
D. C(1/2H2SO4)0.5mol/L溶液

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decide whether the following translations are true or false. many scientists have been

By "alcohol is a dietary Jekyll and Hyde"(Line 1,Paragraph 4), the author means______.

decide whether the following translations are true or false. as for gaps in the fossil

decide whether the following translations are true or false. colleges flood the postal systems with news of who has won a place in next fall’s freshman class. 译文： 美国的邮政部门将被雪片般的大学录取通知书所淹没。()

下列哪种溶液的浓度与C(H2SO4)0.1mol/L的浓度相等？()

decide whether the following translations are true or false. colleges flood the postal systems with news of who has won a place in next fall’s freshman class. 译文：美国的邮政部门将被雪片般的大学录取通知书所淹没。()