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【单选题】
每个蛋白质分子必定具有的结构是:A.
α-螺旋结构
B.
β-片层结构
C.
三级结构
D.
四级结构
E.
含有辅基
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反馈参考答案：
举一反三
【简答题】In my senior year I __________ writing a novel, but without much success.
【简答题】一个C语言程序由___组成,一个C语言程序可以包含一个或多个函数,但有且只有一个主函数,函数的开始标志是___,结束标志是右花括号。C程序每条语句的最后必须有一个___号。
【单选题】In my senior year I ____________at writing a novel, but without much success.
A.
made a difference
B.
went after
C.
in the neighborhood
D.
took a crack
【简答题】Some afternoon in my senior year—shortly before Graduation, the dean of the school came to me asking if I wanted to stay in the department as a teacher. I was not surprised by an offer. I happened to ...
【单选题】In my senior year in university, I ______ running a small business and earned a few thousand dollars.
A.
took a crack at
B.
takes a crack at
C.
followed up
D.
follows up
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