题目内容

一、数学推理每题给你一个数列,但其中缺少一项,要求你仔细观察数列的排列规律综合判断,然后从四个供选择的选项中,选出最恰当的一项,来填补缺项。 5, 4, 10, 8, 15, 16, ( ), ( )

A. 20,18
B. 18,32
C. 20,32
D. 18,32

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不存在于RNA中的碱基是

A. I
B. X
C. A
D. T
E. U

5-氟尿嘧啶的抗癌作用机制是

A. 抑制叶酸还原酶
B. 抑制胸苷酸的合成
C. 抑制尿嘧啶的合成
D. 抑制胸腺嘧啶的合成
E. 合成错误的DNA

Part 3 Two-way DiscussionWe’ve been talking about a famous person whom you would like to meet and now I’d like to discuss with you one or two more general questions related to this. Let’s consider first the topic of fame.What do you think motivates people who seek fameSome people argue that celebrities and famous people have no right to expect privacy because they are in the public eye. What’s your opinionMany celebrities have begun using their fame to raise awareness of social issues. Do you think this is a good trend or a bad trendNow let’s talk about social interaction and meeting people.How important is it to spend time with family members in your culture WhyHow have the ways people socialize in your country changed over time Why do you think these changes have occurredSome members of society feel isolated and alone. What measures can be taken to combat this issue

下列哪种物质不是嘌呤核苷酸从头合成的直接原料

A. 甘氨酸
B. 谷氨酸
C. 天冬氨酸
D. CO2
E. 一碳单位

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