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【简答题】
某烃A的相对分子质量为84。回答下列问题: (1)下列物质与A以任意比例混合,若总物质的量一定,充分燃烧消耗氧气的量不相等的是(填序号)____。 a.C 7 H 12 O 2 b.C 6 H 14 c.C 6 H 14 O d.C 7 H 14 O 3 (2)若烃A为链烃,与HBr加只能得到一种产物,且该烃的一氯代物只有一种。 ①A的结构 ; ②链烃A与溴的CCl 4 溶液反应生成B,B与NaOH的醇溶液共热可得到D,D分子中无溴原子。请写出由B制备D的化学方程式: ; ③B与足量NaOH水溶液完全反应,生成有机物E,该反应的化学方程式: ;E与醇的关系是 。 (3)若核磁共振氢谱显示链烃A有三组不同的峰,峰面积比为3∶2∶1,则A的名称为 。 (4)若A不能使溴水褪色,且其一氯代物只有一种,则A的结构 。
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【简答题】Using context clues and what you know about word parts , write a synonym, description, or definition of the underlined word or phrase. All the hospital's private rooms were occupied, so Michelle had t...
【单选题】In the following exercises, try to develop your ability to guess the meaning of the underlined words or phrases by using context clues. Read each sentence carefully and then tick off the correct choic...
A.
sum of money
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load
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tool
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road
【单选题】Using context clues for help, write the letter of the best meaning for each underlined word. It's a good idea for married couples to discuss their plans in case of each other's demise . For example, d...
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death
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desire to divorce
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success
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concern
【单选题】Section D. Using context clues for help, write the letter of the best meaning for each underlined word or words. 1. Grasshoppers are a prized food in some places, but most people in Western societies ...
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delightful
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disgusting
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confusing
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filling
【单选题】Using context clues for help, write the letter of the best meaning for each italicized word or words. 1. Grasshoppers are a prized food in some places, but most people in Western societies find them r...
A.
delightful
B.
disgusting
C.
confusing
D.
filling
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