题目内容

有关羰基化合物α-位C-烃化，以下说法，错误的是

A. 若引入两个不同的烃基都是伯烃基，应先引入较大的伯烃基，后引入较小的伯烃基
B. 若引入的两个烃基一个为伯烃基，另一个为仲烃基，则应先引入仲烃基再引入伯烃基
C. 若引入的两个烃基都是仲烃基，宜采用氰乙酸酯在乙醇钠或叔丁醇钠存在下反应
D. 若引入两个相同而较小的烃基，可先用等摩尔的碱和卤代烃与等摩尔的活性亚甲基化合物反应，然后再加入等摩尔的碱和卤代烃进行第二次烃化反应

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以下属于亲核取代反应机理的有

A. 羰基化合物α-位C-烃化
B. 炔烃的烃化
C. 烯丙位的C-烃化
D. 苄位的C-烃化

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以下说法中，正确的有

A. 炔烃的烃化中，卤代烃的活性顺序：R相同时，RI> RBr> RCl> RF
B. 烯丙位、苄位的C-烃化中，卤代烃的活性顺序：R相同时，RI> RBr> RCl> RF
C. 羰基化合物α-位C-烃化反应中，卤代烃的活性顺序：R相同时，RI> RBr> RCl> RF
D. 芳烃的烃化，卤代烃的活性顺序：R相同时，RI> RBr> RCl> RF

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Part I — (Paras. 1- 3)On a tour of France, I saw the Mediterranean Sea, but the rip currents me. And it reminded me that I developed due to the experience of last summer and since then, the fear wouldn’t _.Part II — Paras. 4-17When I saw a boy drowning amid the waves, I was in a _ and __ struggle whether I should save him because I was extremely _ water. After my fierce struggle, I made the single big decision: to __ the water. I finally reached the boy and had him under control; but when I swam back toward shore, the rip current was us out to sea. I tried to remember how to escape from a rip current, and with that, I slowly to safety, thus my inner fear of water as well.Part III — (Paras. 18-19)I was _ and in a moment of _ and ______.

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向方法传递数组时，传递的是数组的（）

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