造成防护失效的原因基本上有如下几种:

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问题:

造成防护失效的原因基本上有如下几种:

考点:营业线施工防护员营业线施工防护员题库
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已知两个因数的积是33894,其中一个因数是42,则另一个因数是______.

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Andersen综合征可有下列哪些临床表现()

A.性染色体显性遗传

B.周期性瘫痪

C.肌强直

D.发育畸形

E.心律失常

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《中华人民共和国环境保护法》中的环境指什么?

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完形填空 (共20小题,每小题1分,满分20分)

Are you carrying too much on your back at school? Lots of kids at the same age as you are. Not only are students in China ___36___ from this problem, but kids in the United States are ___37___ fed up with(饱受…之苦) heavy school bags.

Experts are starting to___38___ that more and more young students are having back and neck problems as a result of school bags ___39___ too heavy for them. “It’s hard for me to get up the___40___ with my bag because it’s so heavy,” said Rich Hammond, ___41___ 11-year-old student in the US. Rick is among the students who have ___42___ backpacks with two straps (带子) to carry them, ___43___ a number of other students choose rolling backpacks. However, even with rolling backpacks, ___44___ up stairs and buses with them is ___45___ a problem for kids. Many of them have hurt their knees, backs or necks because of heavy school bags.

But how much is too ___46___? Experts say students should carry ___47___ more than 10 to 15 per cent of their own body weight. Scott Bautch, a Wisconsin ___48___ doctor, said kids under 4th grade should ___49___ with 10 per cent. But it’s also important that older kids don’t go ___50___ 15 percent, because their bones are still growing. Bautch explained that there are other injuries caused by backpacks. “Kids are ___51___ their balance and falling down with these backpacks,” he said.

Parents and teachers are starting to tell the kids to only take ___52___ library books they will be reading that night. Some teachers are using worksheets (作业纸) or ___53___ workbooks for students to take home. One of the best answers is, as some ___54___ themselves suggested, to have no homework ___55___!

36. A.meeting                B.facing                    C.experiencing   D.suffering

37. A.already       B.always             C.yet              D.also

38. A.explain             B.say               C.worry               D.announce

39. A.being              B.be                C.are               D.is

40.A.schools              B.stairs            C.houses             D.homes

41.A.this                 B.that             C.a                    D.an

42.A.special               B.unusual          C.ordinary            D.regular

43.A.when                B.but             C.then                  D.and

44.A. getting               B.climbing     C.going                D.turning

45.A.only                 B.still              C.even                D.just

46.A.more                B.very              C.much              D.many

47.A.no                  B.not              C.any                 D.much

48.A.children              B.student           C.bag                  D.back

49.A.carry               B.stay         C.take               D.bring

50.A.about              B.under        C.beyond               D.before

51.A.keeping             B.missing       C.losing              D.making

52.A.home              B.class         C.school              D.city

53.A.valuable             B.thin         C.important           D.interesting

54.A.reports              B.teachers      C.parents       D.kids

55.A.at all                B.after all      C.in all         D.for all

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男性病人,66岁,突发头痛、视物模糊、失语,测血压210/130mmHg。下列降压药物应首选( )

A.卡托普利
B.速尿
C.心得安
D.异搏定
E.硝普钠

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