机械设计本质安全是指机械的设计者,在设计阶段采取措施来消除隐患的一种实现机械安全的方

题型:多项选择题

问题:

机械设计本质安全是指机械的设计者,在设计阶段采取措施来消除隐患的一种实现机械安全的方法。机械设计本质安全包括( )等方面的内容。

A.设计中排除危险部件

B.使运动的部件处于密封状态

C.避免管理缺陷

D.提供自动反馈设备

E.减少或避免在危险区工作

考点:安全工程师安全生产技术安全工程师安全生产技术真题2008年
题型:多项选择题

X线检查发现胃溃疡,下列哪一种情况显示有恶化()。

A.溃疡龛影直径超过2.5cm

B.胃溃疡合并十二指肠溃疡

C.溃疡位于胃大弯

D.多发性胃溃疡

E.以上都不是

题型:多项选择题

大队旗的规格是底长:(),高:(),旗杆高度为2米零30厘米。

A.120厘米

B.100厘米

C.90厘米

D.80厘米

题型:多项选择题

生石灰(块灰)的主要化学成分是( )

A.CaC03

B.CaO

C.Ca(OH)2

D.CaSO4

题型:多项选择题

(I)下列有关实验的叙述中,合理的是______(填序号)

A.把SO2通入紫色石蕊试液,可验证SO2的漂白性

B.一学生用pH试纸测得某氯水的pH为2

C.不宜用瓷坩埚灼烧氢氧化钠或碳酸钠

D.将10g ZnSO4•7H2O溶解在90g水中配制10%的ZnSO4溶液

E.向某溶液中滴加氯化钡溶液,产生不溶于稀硝酸的白色沉淀,则该溶液中一定含有SO2-4

F.配制一定物质的量浓度的溶液,定容时俯视容量瓶的刻度线,会使所配溶液浓度偏高

(II)(二氯化硫(SCl2)熔点-78℃,沸点59℃.密度1.638g/mL.遇水易分解二氯化硫与三氧化硫作用可生成重要化工试剂亚硫酰氯(SOCl2).以下是由氯气与硫反应合成二氯化硫的实验装置.

回答下列问题:

(1)装置B盛放的药品是______C中是______

(2)实验开始前先在D中放入一定量的硫粉,加热使硫熔化,然后转动和摇动烧瓶使硫附着在烧瓶内壁表面形成一薄层,这样做的目的是______

(3)实验时,D装置需加热至50-59℃,最好采用何种方式加热______.为了防止E中液体挥发,可以采取的措施______.

(4)F装置中干燥管内所盛物质是______的作用是:______.

题型:多项选择题

In America, when the eighth graders leave the middle school, they are often worried about moving to the high school. It is a hard time for them, but it can be an exciting one as well. To make it easier, students need to get familiar with their school.

Even though they’ve done this already in the middle school, it’s still important to find where their classrooms are. Most schools take students to the high school for a visit at the end of their eighth grade year. And, most schools also have a freshman (新生) speech for parents and students before the first year begins. Sometimes the main office will give away a map of the school. This can help students and parents to find different places in the school.

One way to know your high school more and make new friends is to join a club or play a sport. Schools often offer chances to join different clubs and sports. Fall activities begin in August before the first day of school. If you are not interested in sports, there are clubs for any interest, such as drama, dance, chess, photography, community service, etc. These clubs allow students from different grades. By joining an activity, students can find new friendships, not to mention improving their chances in future college applications (申请). The school office will have a list of activities offered at the school and information on how to join them.

What’s more, to have a great start to a high school year, students can write down some of their worries, and ask for help from teachers and school workers.

小题1:According to the text, most students feel ________ when entering the high school.

A.excited

B.nervous

C.lonely

D.disappointed小题2:Which of the following is TRUE about the school clubs?

A.There are fewer students from higher grades in the school clubs.

B.The school clubs in high school only welcome sports fans.

C.Summer activities begin before school starts.

D.The school office can help new students join school clubs.小题3:When do many schools take students to visit their new high school?

A.Before the eighth grade year starts.

B.Right after the high school year starts.

C.At the beginning of the new term in the high school.

D.At the end of their eighth grade year小题4:The main offices will give away maps of their schools________.

A.only to help students to find different places of the schools

B.only to help parents to find different places of the schools

C.to help students and parents to find different classrooms of the schools

D.to help students and parents to find different places of the schools小题5:What is the purpose of this text?

A.To tell the new students how to learn in high school

B.To introduce new schools.

C.To give the teachers some advice.

D.To give advice to new high school students.

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