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【单选题】
按 S N 1 历程,化合物 a.CH 3 CH 2 CH 2 Br 、 b. (CH 3 ) 2 CHBr 、 c. (CH 3 ) 3 CBr 的反应活性是 :A.
a ＞ b ＞ c
B.
b ＞ c ＞ a
C.
c ＞ a ＞ b
D.
c ＞ b ＞ a
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反馈参考答案：
举一反三
【单选题】After several part-time jobs, he's now got a ________ job in a bank.
A.
stable
B.
implicit
C.
fluid
D.
equivalent
【单选题】From an office memo: “I've got a good person for your opening in Accounting. Jesse Brown is his name, and he's as sharp as they come. Jesse has a solid background in bookkeeping, and he's good with co...
A.
Deductive demonstration
B.
Inductive support
C.
Both
【简答题】After several part-time jobs, he's now got a st _____ job in a bank.
【单选题】 Directions: Complete each sentence with what you think as the most appropriate one of the four choices given. _____________ he's got good qualifications, he still can't get a job.
A.
However
B.
In spite of
C.
As for
D.
Even though
【单选题】_______ he's got good qualifications, he still can't get a job.
A.
However
B.
In spite of
C.
As for
D.
Even though
【单选题】关于清蛋白的叙述，正确的是
A.
在浆细胞内合成
B.
是血浆中含量最少的蛋白质 c．严重脱水时血清清蛋白浓度降低 D．正常时清蛋白占总蛋白的40％～60％ E．不能与游离脂肪酸结合
【简答题】After several part-time jobs, he's now got a s____ job in a bank.
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