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【单选题】
关于肽链合成错误的叙述是:( )A.
合成是从N端向C端方向进行
B.
每一次核糖体循环肽链延长一个氨基酸
C.
合成是沿模板3'→5'方向进行
D.
翻译在细胞液中进行
E.
分为起始、延长、终止三个阶段
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反馈参考答案：
举一反三
【简答题】________you understand this rule, you'll have no further difficulty. [A]Once [B]Unless [C]Only [D]Until
【单选题】Not once ______ your sentence correctly.
A.
you have copied
B.
did you have copied
C.
have you copied
D.
have you been copied
【简答题】Once you have a health care directive, the health providers ______.
【简答题】Once you have raised the money to start or expand your business, you don't need to have a business plan any longer.()
【单选题】下列说法对教学系统设计的系统设计观描述正确的是( )
A.
强调媒体是教学系统设计的重要内容
B.
认为教学系统设计是媒体选择的过程
C.
认为教学系统设计人员是通晓各种媒体特性和功能的媒体专家
D.
注意学习理论和美学对媒体制作的指导意义
【单选题】Once you _____ the knack of it, you will have no further difficulty.
A.
shall have
B.
had had
C.
are having
D.
have
【单选题】Once you have finished the design, you may have a whole week.
A.
off
B.
down
C.
in
D.
up
【简答题】You will not get your money back once you agree to have__________________
【单选题】Once you have had the disease, you are ______to it for the rest of your life, which means that you cannot get it again.
A.
exempt
B.
immune
C.
unaffected
D.
insusceptible
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