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【单选题】
关于蛋白质二级结构的描述,错误的是A.
蛋白质局部或某一段肽链有规则的重复
B.
蛋白质部分主链的空间
C.
主链由每个肽键的两个二面角所确定
D.
整条多肽链中全部氨基酸的位置
E.
无规卷曲也属二级结构范畴
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举一反三
【单选题】Digital computer is controlled by internally stored programs and(66) of using common storage for all or part of a program and also for all or part of the data necessary for the execution of the progra...
A.
qualified
B.
competent
C.
capable
D.
able
【单选题】The digital revolution in consumer electronics, including personal computer gadgets, began to gain momentum in 1998, and is expected to take a stronger hold of the market this year (1999). In 1998 the...
A.
The digital revolution began in U.S..
B.
Gadget products are welcomed by everyone.
C.
The digital gadgets are expected to take a stronger hold of the market this year.
D.
Only scientists are aware of the advantages of the digital products.
【简答题】The flash memory devices that digital cameras use to transfer the data to a computer include SmartMedia cards, CompactFlash cards and______.
【判断题】技术动作结构分析: 头顶球技术是由以下四个环节组成,其中每一环节又由它的作用、目的等要素组成。 (1)移动选位 (2)身体摆动 (3)头触球 (4)触球后的身体平衡 判断题: 145、头顶球是指运动员有目的地将球击向对方球门的动作。
A.
正确
B.
错误
【单选题】The computer system is meant to provide students with quick and easy ______ to the digital resources of the library.
A.
access
B.
passage
C.
way
D.
passport
【简答题】digital computer
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