2013年10月24日下午，内蒙古自治区包头市回民红学发生一起疑似食_爱下问搜题

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问题选择题

2013年10月24日下午，内蒙古自治区包头市回民红学发生一起疑似食物中毒事件，相继有240多名学生出现腹痛、呕吐等症状，这已是近一个月来被媒体曝光的第11起学生食物中毒事件．频频发生的食物中毒时间，给校园食品安全敲响了警钟．食用下列食物容易引发食物中毒的是（　　）

①发芽的马铃薯②在保质期内的袋装食品 ③放了几天的剩饭剩菜④颜色鲜艳的蘑菇．

A．①③④

B．①②③

C．①②④

D．②③④

答案

①马铃薯也叫土豆，发芽的土豆中含有一种对人体有害的生物碱称龙葵素，它对人体胃肠粘膜有刺激作用，并有溶血及麻痹呼吸中枢的作用．发芽土豆的芽眼、芽根和变绿的部位含量更高，人吃了会有咽喉痒、恶心、呕吐、腹痛等症状，重者会死亡，故发芽的土豆不能吃，故符合题意；

②在保质期内的袋装食品是最佳食用期，食用起来也安全；，故不符合题意；

③放了几天的剩饭剩菜已经变质，变质的食物却不能食用，因为变质食物中的蛋白质就被破坏了，碳水化合物被酶分解后发酵了，油脂很容易被氧化，产生一系列的化学反应，氧化后的油脂有怪味，变质的食物不仅外观发生变化，失去原有食物的色、香、味品质，营养价值也会下降，还会含有相应毒素危害人体健康，食后会对身体造成危害．故符合题意．④很多颜色鲜艳的蘑菇都有毒，这是因为细胞中会合成毒蛋白，是生物在长期的自然选择过程中，形成的一种自我保护现象．是一种适应．那么鲜艳的颜色是一种警戒色，可以提醒其他生物躲避，而达到保护自己的目的．

故选：A

完形填空

阅读下面短文，掌握其大意，然后从36～55各题所给的A、 B、C、D四个选项中，选出最佳选项。
Children model themselves largely on their parents. They do so mainly through identification. Children identify   36  a parent when they believe they have the qualities and feelings that are   37  of that parent. The things parents do and say---and the   38  they do and say to them--therefore strongly influence a child’s   39 . However, parents must consistently behave like the type of   40  they want their child to become.
A parent’s actions   41  affect the self-image that a child forms   42  identification. Children who see mainly positive qualities in their   43  will likely learn to see themselves in a positive way. Children who observe chiefly   44  qualities in their parents will have difficulty   45  positive qualities in themselves. Children may   46  their self-image, however, as they become increasingly   47   by peers groups standards before they reach 13.
Isolated(孤立的) events,   48  dramatic(突然的) ones, do not necessarily have a permanent   49  on a child’s behavior. Children interact such events according to their established attitudes and previous training. Children who know they are loved can,   50 , accept the divorce of their parents’ or a parent’s early   51 . But if children feel unloved, they may interpret such events   52  a sign of rejection or punishment.
In the same way, all children are not influenced   53  by toys and games, reading matter, and television programs.   54  in the case of a dramatic change in family relations, the   55  of an activity or experience depends on how the child interprets it.

B．characteristic

B．nevertheless

D．as a result

D．independent

B．for example

D．theoretically

单项选择题

根据现行房屋登记收费规定，非住房登记的房屋权利人按规定申请并完成一次登记的为一件，收费标准为每件( )元。

A．10
B．20
C．80
D．550