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【判断题】
染色体的三大功能元件包括自主复制 DNA 序列, 着丝粒 DNA 序列和端粒 DNA 序列。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】If you've been joining in chat room conversations, or exchanging e-mails with net pals, you have become one of the millions who write in a special, short form of English. Throughout the world, every n...
【判断题】Net allows people to learn, shop, find crucial information, and to participate in communities, whether they're local, global, or simply virtual
A.
正确
B.
错误
【简答题】With the rapid development of network, network literature, as a new literary form, has been rising in contemporary literature. This form. of literature allows everybody to be a writer if he or she wan...
【单选题】根据以下内容，回答下列各题。 Internet use appears to cause a drop in psychological health, according to research at Carnegie Mellon University. Even people who spent just a few hours a week on the Internet experien...
A.
People spend more time on the Internet now.
B.
People spend less time with their families and friends now.
C.
The Net proves socially healthier than television.
D.
lnternet use may cause a drop in psychological health.
【简答题】根据《自然保护区条例》的规定，下列关于在自然保护区内的建设限制表述中不正确的是（ ）。
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