所谓非碘盐，不仅指未加碘的原盐，还包括一些不法商贩贩卖的劣质盐、平锅盐、土盐和工业废

发布时间：2019-09-28 09:16 │ 来源：www.tikuol.com

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所谓非碘盐，不仅指未加碘的原盐，还包括一些不法商贩贩卖的劣质盐、平锅盐、土盐和工业废盐。由于价格低又送货上门，往往使不明真相的群众深受其害。这些盐不仅碘含量极少，干扰碘缺乏病的防治，而且盐中所含的各种杂质会给食用者带来一些严重的危害。如亚硝酸盐含量过多可引起（）.

A.高血压，引发脑卒中

B.高血糖，引发糖尿病

C.中毒，严重者可导致死亡

考点：环境科学技术及资源科学技术环境与健康环境与健康题库

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绘图题：画出锅炉、汽轮机、发电机、升压变压器、输电线路、降压变压器及电力用户组成的系统接线示意图。

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局域网在网络拓扑上主要采用了星型、环型和【】结构。

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完形填空。
When I come across a good article in reading newspapers. I often want to cut and keep it. But just as I am about to do so I find the article on the 1 side is as much interesting. It may be a discussion of the way to 2 in good health, or a 3 about how to behave and conduct oneself in society. If I cut the front article, the opposite one is likely to 4 damage, leaving out half of it or keeping the text 5 the title. Therefore, the scissors would 6 before they start, 7 halfway done when I find out the 8 result. Sometimes two things are to be done at the same time, both worth you 9 .You can only take up one of them, the other has to wait or be 10 up. But you know the future is unpredictable (不可预料) - the changed situation may not allow you to do what is left 11 . Thus you are 12 in a difficult position and feel sad. How 13 that nice chances and brilliant ideas should gather around all at once? It may happen that your life 14 greatly on you preference of one choice to the other. In fact that is what 15 is like, we are often 16 with the two opposite sides of a thing which are both desirable like a newspaper cutting. It often occurs that our attention is drawn to one thing only 17 we get into another. The 18 may be more important than the latter and give rise to a divided mind. I 19 remember a philosopher's remarks, "When one door shuts, another opens in life." So a casual (不经意) 20 may not be a bad one.
( )1. A. front ( )2. A. get ( )3. A. advice ( )4. A. suffer ( )5. A. on ( )6. A. use ( )7. A. or ( )8. A. satisfying ( )9. A. courage ( )10. A. given ( )11. A. near ( )12. A. filled ( )13. A. dares ( )14. A. improves ( )15. A. study ( )16. A. faced ( )17. A. before ( )18. A. following ( )19. A. still ( )20. A. treatment	B. same B. keep B. news B. reduce B. for B. handle B. but B. regretful B. strength B. held B. alone B. attracted B. comes B. changes B. society B. supplied B. after B. next B. also B. action	C. either C. lead C. theory C. prevent C. without C. prepare C. so C. surprising C. attention C. made C. about C. caught C. deals C. progresses C. nature C. connected C. until C. above C. once C. choice	D. opposite D. bring D. report D. cause D. off D. stay D. for D. impossible D. patience D. picked D. behind D. struck D. does D. goes D. life D. fixed D. as D. former D. almo st D. remark

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下列是统计功效的为( )。

A．α

B．1-α

C．β

D．1-β

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穿层钻孔预抽石门揭煤区域煤层瓦斯区域措施应当在揭煤工作面距煤层的最小法向距离（）以前实施。

A、5m

B、7m

C、3m

D、6m

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