激光焊接是激光与非透明物质相互作用的过程,这个过程表现为()及气化等现象。A、反射

题型:多项选择题

问题:

激光焊接是激光与非透明物质相互作用的过程,这个过程表现为()及气化等现象。

A、反射

B、吸收

C、加热

D、熔化

考点:建设工程技术与计量(安装工程)第一节切割和焊接第一节切割和焊接题库
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以下不属于化学性危险和有害因素的是().

A.有毒物质

B.腐蚀性物

C.粉尘与气溶胶

D.易燃易爆物质

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项目风险的分解途径不包括()。

A.目标维

B.时间维

C.方法维

D.结构维

题型:多项选择题

阅读理解

     Half an hour of exercise a day can add an extra five years on your life, a ground breaking research has

revealed.Health experts said that walking or cycling gently has massive longterm benefits.According to the World Health Organization, research carried out in Britain and Denmark shows that gentle workouts

(锻炼) and even housework every day can boost life spans by as much as five years.

      The news will provide encouragement for those couch_potatoes to start taking exercise.Britain is in

the grip of an obesity epidemic (肥胖症), with just 35% of men and 24% of women taking regular

exercise.

     "Encouraging people to be physically active every day has so many health benefits, " said Dr.Marc

Danzon, WHO regional director for Europe."These include reducing the risk of developing certain

diseases and of becoming obese, as well as contributing to physical coordination, balance, strength and

mental wellbeing.It is a very costeffective public health tool."

     The organization is so concerned that the public is not getting the message on exercise that it will 

 launch a "Move for Health" campaign to boost public awareness.

      "The WHO encourages adults to take at least 30 minutes of moderate physical exercise a day,

defined as any body movement that results in energy expenditure (消耗), " said Dr  Danzon."This

includes walking, cycling, playing, housework, climbing stairs as well as sports." He added that children

should take at least 60 minutes of exercise every day.

1. The underlined phrase "couch potatoes" probably means______.

A. lazy bones who spend a lot of time sitting

B. people who like eating potatoes

C. persons who usually rest on a couch

D. players who take exercise with potatoes

2. Taking physical exercise every day benefits one's health in the following aspects except________.

A. strengthening body coordination

B. developing certain diseases and becoming obese

C. keeping body balance

D. keeping fit mentally

3. Which statement is NOT true according to the passage?

A. Children should take more physical exercise than adults every day.

B. The WHO has tried to improve people's knowledge about exercise by launching a campaign.

C. People with an obesity epidemic in Britain seldom take regular exercise.

D. Physical exercise brings the best possible profit to public health at the lowest cost.

4. The passage mainly tells us________.

A. how to take exercise  

B. what the WHO is

C. how to lose weight  

D. how to add years to your life

题型:多项选择题

既可以绘直线,又可以绘曲线的命令是()。

A.样条曲线

B.多线

C.多段线

D.构造线

题型:多项选择题

单位存款人办理以下()业务,应由法人代表或单位负责人亲自办理,无法亲自办理的,授权代理人办理。

A.办理转账支票业务

B.印鉴变更

C.开立汇票

D.购买重要空白凭证。

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