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问题 单项选择题

在热演化过程中，干酪根成分随埋藏深度的增加，其变化过程为（）。

A、富氧一失氢一富集碳

B、失氧一失氢一富集碳

C、失氧一富氢一富集碳

D、失氧一失氢一失碳

答案

参考答案：C

完形填空

B

A(n) (81) ___________writer about 2,000 years ago called Pausanias came on a(n) (82) ___________journey to find out about the present-day Olympic Games. He interviewed a(n) (83) ___________named Li Yan. He learned that there were two main (84) ___________of Games—the Winter and Summer Olympics, and that both were held four years on a regular (85) ___________.Anyone who has reached an agreed standard for their event can be admitted as (86) ___________.To Pausanias’s surprise, women are playing a very important role in many games. Every country wants to (87) ___________the Olympic Games, and it is a great (88) ___________but also a great honour to be chosen. Li Yan told him that the Chinese were very (89) ___________because the 2008 Olympic Games would be held in Beijing. Pausanias was happy to know the (90) ___________of the Olympics—“Swifter, Higher and Stronger” and he felt very interested in it. 
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单项选择题

对于同时分属于不同级别的临时性水工建筑物，其级别应按照其中（）确定。

A.最高级别

B.最低级别

C.重要级别

D.标准级别
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