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●下图为Web站点的默认网站属性窗口，要指定网站的启动文件，需要在 (68) 选项卡中进行配置。
(68)
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What is the temperature in Cambridge？
[A]22．
[B]23．
[C]25．
[D]34．
什么是顺反子？用“互补”和“等位基因”说明“基因”这个概念。
两个连锁基因的连锁强度______，那么测交出来的遗传距离越大。如果一个杂合体自交或测交均分离不出新类型，那
Questions 18 to 20 are based on the following Passage. At the end o f the Passage, you will be given 15 seconds to answer the questions.
Now, listen. to the passage.
The purpose of Magellan's expedition was
[A] to sail round the world.
[B] to find navigation lane from the Atlantic to the Pacific.
[C] to make a voyage to Asia.
[D] to carry men to Philippines.
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