题目

修改文中错误。文中共有10处错误,每句中最多两处。错误涉及一个单词的增加、删除或修改。 Dear Mr. Li, I’m very sorry to have missed the first two lessons this morning. I got up early as usually in the morning, but when I was ready to leave I find my bicycle’s front tyre(轮胎)flat. I wanted to take bus or taxi to school, and I didn’t have any money with me. I had to look for a place along the street to get my bicycle repairing. Unluckily, there were not any bicycle repair shops where were open in the early morning. So I had to walk to sch 一些元素是人体正常生理活动必不可少的.如人体缺碘会影响正常的生命活动,为提高人体素质,食物补碘已引起人们的高度重视. (1) 碘是人和动物体内合成下列哪种激素的原料 [  ] A. 生长激素 B. 甲状腺激素 C. 胰岛素 D. 性激素 (2) 成年人体内缺碘易产生的病症是 [  ] A. 甲状腺机能亢进症 B. 地方性呆小症 C. 侏儒症 D. 地方性甲状腺肿大 (3) 为了防止上述现象发生,1996年我国政府以国家标准的方式规定在食盐中添加碘酸钾(KIO3)来补充碘摄入量的不足.碘酸钾属于哪一类化合物 [  ] A. 酸 B. 碱 C. 盐 D. 氧化物 (4) 市售的“加碘盐”外包装文字说明都有“含碘量”的字样,这儿的碘是指 [  ] A. 碘酸钾 B. 碘元素 C. 碘分子 D. 碘离子 (5) 已知一个成年人每天需要食盐3~5克,碘的适宜摄入量每天为100~200微克.假如碘的摄取80%来自加碘盐,请你设计一下,每千克食盐应该加入多少碘?做一个社会调查,查看一下市场销售的“加碘盐”的含碘量是否符合要求.
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