有几种夹具结构方案时，任选其中哪一种方案都可以.-我要搜题网

[不定项选择题]共用题干 ‘Feed Me Better'
When British TV chef Jamie Oliver launched his‘Feed Me Better'campaign in 2004 in schools in the Greenwich area of London with the aim of improving the diet of British schoolchildren,some people were skeptical about the impact it would have.Oliver's highly-publicized television campaign to improve school lunches led to dramatic changes in the meals offered to pupils in the Greenwich schools.In order to achieve his aim Oliver needed to show schools how to swap（交换）cheap processed meals , which were high in saturated fat（饱和脂肪）,salt , and sugar , for healthier options.
Now,research at the Institute for Social and Economic Research(ISER)has shown that Oliver's experiment did not only help pupils eat more healthily,it also resulted in them performing better at school in English and Science and in helping schools reduce their rates of absenteeism（缺勤）.The ISER study, carried out by Michele Belol and Jonathan James,showed"substantial"positive effects,with the performance of 1 1 -year-old pupils eating Oliver's meals improving by up to 8% in Science and by as much as 6% in English.In addition,the number of children having authorized absences for sickness since 2004 showed a 14% decrease.
The ISER study analysed the academic test results of more than 13,000 children in Greenwich between 2002 and 2007 to evaluate the impact of Oliver's healthier meals on school performance.Pupils who sat exams in 2006-2007 had been on the new diet for at least 12 months,and the researchers found that the number of pupils reaching higher levels of achievement had clearly risen.The study also compared the results of the schools in Greenwich with those of pupils of the same age in seven other London areas who did not eat the meals created by Oliver.The researchers were surprised by the speed of improvements in the Greenwich pupils.They could find no other explanation for the results except for the healthier and more nutritious meals created by Oliver.
Commenting on ISER's findings,Oliver said he felt the research proved that he was right in his decision to remove fatty processed food and replace it with nutrient-rich（营养的）foods such as coconut （椰子）,fish, and broccoli（花椰菜）.He commented that “we could see that it made them calmer and therefore able to learn”. The ISER did not do a comparative study on the impact of the new diet.
A.Right
B.Wrong
C.Not mentioned

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[多选题]建筑倒塌类安全防护方法(　　)
A.要在门口用直流水向室内顶部进行扫射，防止室内顶部掉落物伤人。
B.扑救大跨度钢结构厂房时，要及时持续冷却钢梁、钢柱等承重钢构件
C. 扑救多层建筑火灾，楼层内积水较多时，要利用内楼梯、电梯井或开凿孔洞等进行排水，防止楼板承载过重引起建筑倒塌。
D.着火建筑物、堆垛或大型货架发生局部倒塌后，要密切注意观察未倒部分的异常变化，防止倒塌伤人

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[单选题]（）是局域网拓扑结构之一。
A.环形拓扑
B.三角形拓扑
C.正方形拓扑
D.多边形拓扑

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[判断题]根据《儿童互联网保护法》，美国的公共图书馆都必须给联网计算机安装色情过滤系统，否则图书馆将无法获得政府提供的技术补助资金。

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[填空题]

Petroleum is a very important mineral. It gives us heat and light. It also gives us power for our cars, planes, and ships. It gives us power for machines of all kinds.
How was petroleum created Scientists believe petroleum was formed from the remains of plants and animals. These plants and animals lived and died millions of years ago. Remains are what is left after a plant or animal has died.
What exactly is petroleum Petroleum is a mineral that is a mixture of hydrocarbons. It is an oily liquid which may be brown, green, or black in color. The word "petroleum" comes from Latin and Greek. It means "rock oil".
Crude oil is petroleum that comes directly from deep in the ground. It is then taken to a refinery. A refinery is a kind of factory with equipment in it to refine oil. At a refinery the crude oil is purified and separated into its various parts. From the refined petroleum we obtain important products, such as gasoline, kerosene, fe

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[单选题]天然气水合物是轻的碳氢化合物和()所形成的笼形晶状包络物,即水分子借氢键结合形成笼形晶格,而气体分子则在分子间作用力作用下被包围在晶格笼形孔室中。
A.冰
B.水汽
C.液态水
D.油

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[单选题]某日民警小张负责访周边，熟悉相关情况，并对治安问题进行调查研究。下列行为是他一天的行程,其中不属于治安状况调查的是:
A.早上到居民李某家,了解他对社区民警工作的意见
B.中午到某商场探访安全出口和消防物品的状况
C.下午和商场收银员聊天,咨询近期商品丢失情况
D.傍晚到某小区和群众交谈,了解邻里家常

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[多选题]点验通常由（）组织实施。
A.班长
B.副站长
C.单位主官
D.上级机关

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[判断题]桥梁用锚具、夹具常规检测项目为硬度和静载锚固性能试验。（）
A.正确
B.错误

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[单选题]安装ZPW2000自动闭塞室外设备时,空心线圈安装在电气绝缘节区( )。
A.中间
B.两边
C.左边
D.右边

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[单项选择]违反爆炸性物品的管理规定，在生产、储存、运输、使用中发生重大事故，造成后果特别严重的，处（）有期徒刑。
A. 三年以上七年以下
B. 三年以上
C. 七年以下

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[判断题]化妆品标识不需要标注全成分表。标注方法及要求应当符合相应的标准规定。
A.正确
B.错误

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[单选题]炼油厂是以( )为原料进行生产、加工产品的工厂,不仅原材料和产品具有易燃易爆的特点,其生产过程也具备燃烧爆炸的危险,炼油厂发生火灾时,极易发生连锁反应,造成扑救困难、损失严重的后果。
A.原油
B.石油
C.柴油
D.汽油