A. the reasons craters are difficult to study B. the different shapes C. some features of large craters D. some difference in the ways small and large craters were formed 参考答案:C 答案解析:推理题。由文章第三段最后一句"The complexity of shape increases for larger craters．”可知，下文将谈到大型弹坑的特点。因此，C选项为正确答案。
第30题: [单项选择]某32位计算机的Cache容量为16KB，Cache块的大小为16B，若主存与Cache地址映像采用直接映像方式，则主存地址为0x1234E8F8的单元装入Cache的地址是( )。 A. 00010001001101 B. 01000100011010 C. 10100011111000 D. 11010011101000 参考答案:C 答案解析:[解析] 因为Cache容量为16KB，所以Cache地址长14位。主存与Cache地址映像采用直接映像方式，将32位的主存地址Ox1234E8F8写成二进制，取低14位就是Cache地址。 [
第36题: [单项选择]{{B}}Passage one
Questions 26 to 28 are based on the passage you have just heard.{{/B}} A. Income, years of schooling, and job type. B. Income and work environment. C. Education and mood. D. Occupation and influence of family members. 参考答案:A 答案解析:[听力原文]
What plays a part in determining a person’s smoking habit
[解析] 事实细节题。文中指出"Income，educati
