第20题: [简答题]Nowhere in the world are conditions better for growing trees than in the. tropics, where year-round warmth and moisture encourage rapid growth. 参考答案:对于种植树木的条件来说,世界上没有哪个地方比热带更好,在热带,常年的温暖和湿润会促使树木快速生长。
A. He was on a field trip. B. He was vacationing in Florida. C. He was studying most of the time. D. He was vacationing at home. 参考答案:C 答案解析:[听力原文]9-10 Judy: Hi, Tom! Tom: Judy. Haven't seen you in weeks. Where have you been Judy:
第36题: [单项选择]下列疾病与结肠癌关系最密切的是() A. 回盲部结核 B. 家族性结肠息肉病 C. 溃疡性结肠炎 D. 血吸虫性肉芽肿 E. 克罗恩病 参考答案:B 答案解析:家族性息肉病是常染色体显性遗传病,常在青春发育期出现结、直肠腺瘤,以后逐渐增多,甚至可以布满所有结、直肠黏膜,如不及时治疗,终将发生癌变。所以与结肠癌关系最密切是家族性结肠息肉病。故答案应选B。