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【单选题】
下列叙述不正确的是( )A.
DNA和RNA是遗传的主要物质基础
B.
基因是遗传的基本结构和功能单位
C.
1个DNA分子具有多个基因
D.
基因的复制是通过DNA的复制而实现的
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反馈参考答案：
举一反三
【单选题】How are lifelines attached to a life float?（）
A.
By serving
B.
By splicing one end of the line around the apparatus
C.
Securely attached around the outside in bights no longer than three feet
D.
With an approved safety hook or shackle
【简答题】是伟大的( )主义者、伟大的( )革命家、战略家和理论家。
【简答题】为什么发展是我们党执政兴国的第一要务？
【简答题】A．He will be forgiven if he confesses to stealing the umbrella. B．He will be given a reward if he returns it. C．He will be involved in trouble if he doesn't return it. D．There is something wrong with ...
【单选题】As a boy he wanted to be a fireman. As a high school student, he thought he’d like to become a teacher. Now he______to be nothing more than a janitor.
A.
assumes
B.
prescribes
C.
aspires
D.
presumes
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