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【简答题】
阅读理解。 'What would you do if you were the mayor (市长) of your city?' We asked some students from different cities. Here's what they said: Deng Chuan,15, from Dazhou With the development of modern industry (工业), more and more waste water is being poured into the Zhouhe River, It has caused serious pollution. The river is becoming so dirty that few living things can live in it. So, if I were the mayor, I would order all the factories that pour the waste water into the river to close down. As we all know, water is the source (根源) of our lives. It is very important to protect water. Zhang Yan,14,from Chengdu Our city is more and more beautiful. But sometimes it's not convenient for the blind. There are not enough pavements (人行道) in our city. Some of the old ones are broken. They may not be safe to walk on! If I were the mayor of our city, I would build more pavements for the blind. Wang Lili, 16,from Chongqing There are more and more old people in our city. And there are not enough places for them to relax and enjoy themselves. So, if I were the mayor, I would build an activity center in each residential (住宅) area for the old. So old people can play cards or chess. This will make old people not feel lonely any more and spend remaining years comfortably. 1. What does Deng Chuan care for? [     ] A. Water pollution. B. Air pollution. C. Pavements for the blind. D. Activity centers for the old. 2. Who's the youngest of the three students? [     ] A. Deng Chuan B.Zhang Yan C. Wang Lili D. I don't know. 3. Which of the following is FALSE? [     ] A. It's very important for Dazhou to protect water. B. There aren't enough places for the old people to relax and enjoy themselves in Chongqing. C. There are enough pavements for the blind in Chongqing. D. Some of the old pavements in Chengdu are broken.
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参考答案:
举一反三
【判断题】非食源性物质不会造成人体伤害。
A.
正确
B.
错误
【单选题】兽用新生物制品的研究、田间试验和区域试验,必须严格遵守 ( ) 的规定。
A.
兽用新生物制品管理办法
B.
兽药管理条例
C.
兽药管理条例实施细则
D.
兽用生物制品管理办法
【判断题】明矾净水是利用了铝离子的水解产生Al(OH)3胶体具有吸附性。
A.
正确
B.
错误
【简答题】简述干粉灭火器的使用方法
【单选题】将5 mol· L -1 HCl溶液和1mol·L -1 HCl溶液混合,配制2mol· L -1 HCl溶液,请问需要5 mol·L -1 HCl溶液和1mol·L -1 HCl溶液的体积之比是:(设混合后溶液的体积等于混合前两种溶液体积之和)                              ( )
A.
1:3
B.
3 :1
C.
1:4
D.
4:1
【简答题】用简单并有明显现象的化学方法鉴别下列各组化合物: 正庚烷 1,4-庚二烯 1-庚炔
【单选题】1mol/L NaOH滴定0. 1mol/L HAc溶液,化学计量点时pH为(    )
A.
7.0    
B.
9.7    
C.
8.7
D.
5.3
【多选题】食品中非食源性物质危害大多不是客观原因造成的,所以是可以通过努力改正的。一般情况下可采取以下措施进行预防:
A.
要加强员工的职业素质培训和安全教育
B.
要控制原辅材料及包装材料中非食源性物质危害。
C.
要加强生产过程的监控管理、设备的维护和生产工艺的改进。
D.
控制温度、湿度和高温杀菌
【简答题】食品中常见的非食源性物质有哪些?
【单选题】在 非食源性物质危害不包括:
A.
硬塑料
B.
牙签
C.
扣子
D.
毛发
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