起重机械室外触电安全防护措施主要包括_。A.保证绝缘的可靠性  B.保证安全电压

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问题:

起重机械室外触电安全防护措施主要包括_。

A.保证绝缘的可靠性 

B.保证安全电压 

C.保证配电最小安全净距 

D.保证接地与接零的可靠性 

E.加强屏护保护 

考点:特种设备安全知识竞赛特种设备安全技术特种设备安全技术题库
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在编译Java程序时,用于指定生成.class文件位置的选项是( )。

A.-g

B.-d

C.-verbose

D.-nowam

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以下疾病不属于血管外溶血的是()

A.PNH

B.自身免疫性溶血

C.地中海贫血

D.新生儿溶血

E.异常血红蛋白病

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越窑

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教学片段:在上《孝敬父母》一课之前,教师预先布置了“我为爸爸(或妈妈)洗一次脚”的活动,并写出自己的感受。(第二天,同学们纷纷上台交流。)生1.“我闻到了妈妈的脚臭,但是我不觉得臭,因为她都是为了我。”生2.“我才知道,妈妈以前为我洗脚、洗澡的时候是多么辛苦呀!”生3.“洗完脚我还帮妈妈喷香水,喷完后好香好香,感觉非常好!”生4.“妈妈的脚已经脱皮,变得十分粗糙。这双脚陪着妈妈走过无数的路。”生5.“我给爸爸洗脚的时候,爸爸一边喝着茶,说要慢慢地洗,享受享受。”(教师不作声,学生继续交流。)生6.“我要给妈妈洗的时候,妈妈说已经洗过了。我说这是老师布置的作业,一定要洗的。后来我给妈妈洗的时候,发现妈妈是骗我的,不让我给她洗。”生7.“爸爸很好奇,先问我,为什么要给他洗脚?我说这是作业。洗好了爸爸还给了我5元钱。(全班学生哄堂大笑,教师不作声,学生继续交流。)问题:

请你从“教师是课堂学习活动的指导者”角度对上述教学片段作简要的点评。

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Law-and-order is the longest-running and probably the best-loved political issue in the U.S. history.

(46) Yet it is painfully apparent that millions of Americans who would never think of themselves as lawbreakers, let alone criminals, are taking increasing liberties with the legal codes that are designed to protect and nourish their society. Indeed, there are moments today when it seems as though the scofflaw represents the wave o the future. (47) Harvard Sociologist David Riesman suspects that a majority of Americans have blithely taken to committing supposedly minor derelictions as a matter of course. Already, Riesman says, the ethic of U.S. society is in danger of becoming this. "you’re a fool if you obey the rules. "

Nothing could be more obvious than the evidence supporting Riesman. Scofflaws abound in amazing variety. The graffiti-prone turn public surfaces into visual rubbish. Bicyclists often ride as though two-wheeled vehicles are exempt from all traffic laws. Litterbugs convert their communities into trash dumps. (48) Widespread flurries of ordinances have failed to clear public places of high-decibel portable radios, just as earlier laws failed to wipe out the beer-soaked hooliganism that plagues many parks. Tobacco addicts remain hopelessly blind to signs that say NO SMOKING. Respectably dressed pot smokers no longer bother to duck out of public sight to pass around a joint. The flagrant use of cocaine is a festering scandal in middle-and-upper-class life. And then there are (hello, Everybody!) the jaywalkers.

The dangers of scofflawry vary widely. (49) The person who illegally spits on the sidewalk remains disgusting, but clearly poses less risk to others than the company that illegally buries hazardous chemical waste in an unauthorized location. The farebeater on the subway presents less threat to life than the landlord who ignores fire safety statutes. The most immediately and measurably dangerous scofflawry, however, also happens to be the most visible. The culprit is the American driver, whose lawless activities today add up to a colossal public nuisance. (50) The hazards range from routine double parking that jams city streets to the drunk driving that kills some 25,000 people and injures at least 650,000 others yearly. Illegal speeding on open highways New surveys show that on some interstate highways 83% of all drivers are currently ignoring the federal 55 mph speed limit.

(47) Harvard Sociologist David Riesman suspects that a majority of Americans have blithely taken to committing supposedly minor derelictions as a matter of course.

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