问题 选择题

2004年4月16日,重庆天原化工总厂发生氯气泄漏及爆炸特大事故,喷出的氯气造成多人伤亡.作为消防干警在现场作以下处理方法和过程较为合理的是(  )

①及时转移疏散人群,同是向有关部门报告事故有关情况 ②被转移人群应带上用浓氢氧化钠处理过的口罩 ③用高压水枪向空中喷洒含有碱性物质的水溶液 ④被转移人群应带上用Na2CO3溶液处理过的口罩 ⑤将人群转移到地势较低的地方即可,不必太远 ⑥及时清理现场,检查水源及食物等是否被污染 ⑦常温下氯气能溶于水,所以只要向空中喷洒水就可以解毒.

A.②③④⑤

B.①③④⑥

C.①②⑤⑥

D.①③⑤⑦

答案

①及时转移疏散人群,同是向有关部门报告事故有关情况,做到了发现问题及时上报,并尽最大程度的保护群众,故①正确;

②被转移人群应带上用浓氢氧化钠处理过的口罩,则会受到浓氢氧化钠的腐蚀,做法不合理,故②错误;

③因氯气能溶于碱性物质的溶液,用高压水枪向空中喷洒含有碱性物质的水溶液可减少空中氯气的含量,故③正确;

④因氯气能溶于碱性物质的溶液,且Na2CO3溶液显弱碱性,则被转移人群应带上用Na2CO3溶液处理过的口罩可减少氯气中毒,故④正确;

⑤氯气的密度比空气的大,地势较低的地方氯气含量大,中毒的可能性大,将人群转移到地势较低的地方是不合理的,故⑤错误;

⑥及时清理现场,检查水源及食物等是否被污染,减少污染源,做法合理,故⑥正确;

⑦常温下氯气能溶于水,但氯气在水中的溶解度不大,则只向空中喷洒水就可以解毒的做法不合理,故⑦错误;

故选B.

单项选择题

An Indian anthropologist, Chandra Thapar, made a study of foreign cultures, which had customs similar to (91) of his native land. One culture in (92) fascinated him because it reveres one animal (93) sacred, much as the people in India (94) the cow. The things he discovered might interest you (95) you will be studying India as part of this course.
The tribe Dr. Thapar (96) is called the Asu and is found on the American continent north of the Tamhumara of Mexico. Though it seems to be a (97) developed society of its type, it has an overwhelming (98) with the care and feeding of the rac—an animal much like a bull in size, strength and temperament. In the Asu tribe, it is almost a social (99) to own at least one (100) not more rats. People not possessing at least one are (101) in low esteem by the community because they are too poor to (102) one of these beasts properly. Some members of the tribe, to (103) their wealth and social prestige, even own (104) of racs.
(105) the rac breed is not very healthy and usually does not live more than five to seven years. Each family invests large (106) of money each year to keep its rac healthy and shod, for it has a tendency to throw its shoes often. There are rac (107) in each community, perhaps more than one if the community is particularly (108) . These specialists, however, due to the long period of ritual training they must undergo and (109) the difficulty of obtaining the right selection of charms to treat the rac, demand (110) offerings whenever a family must treat an ailing rac.

A.those

B.that

C.it

D.them

问答题 简答题