第8题: [单项选择]Questions 15-18 are based on the following dialogue:What problem does the man have A. He was absent from class. B. He missed his doctor’s appointment. C. He has messy handwriting. D. He will miss class later in the week. 参考答案:D 答案解析:[听力原文]15-18 M: I have a problem, and I hope you can help me out. W: What’s your problem M:
第10题: [单项选择]Which of the following word can best explain the word "critical" on the second line, paragraph 4 A. Crucial. B. Looking for faults. C. Great. D. Dangerous. 参考答案:A 答案解析:[解析]该题的答案在最后一段。critical 在此处是指冰山已移动的一个临界的厚度,后面紧接着解释了该词。所以我们选择A,而不选择它的另一个意思“挑毛病的”,即 B选项。C不够具体,如果把临界厚度引
第20题: [单项选择]主要功能是通过摄取Ch进入细胞内的是 A. HDL受体 B. LDL受体 C. 清道夫受体 D. VLDL受体 E. TG受体 参考答案:B 答案解析:考察脂蛋白受体的生理功能,低密度脂蛋白受体能和LDL结合之外,还能和含有APOE的VLDL、β-VLDL、LDL残基等结合,将它们吞入细胞内,使细胞从所摄取的脂蛋白中获得脂质(主要为胆固醇)。