合并同类项:4a2b-5ab+3a2b+2ab=______.

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问题:

合并同类项:4a2b-5ab+3a2b+2ab=______.

考点:同类项
题型:填空题

我国古代最杰出的医德经典是()

A.张仲景的《伤寒杂病论》

B.孙思邈的《大医精诚》

C.陈实功的《五戒十要》

D.肖纲的《劝医论》

E.李梃的《医学入门》

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( )的资金来源是发行国家政策性金融债券。

A.国家开发银行

B.中国进出口银行

C.中国农业发展银行

D.中国银行

题型:填空题

有人说:“政治是政府的事,与我无关,参与不参与无所谓。“对这一观点的理解不正确的事(   )

A.错误,政治与每个人的利益息息相关

B.错误,这样会损害全体人民的利益

C.错误,这是缺乏主人翁责任感的表现

D.正确,因为公民有自己的自由

题型:填空题

Federal Child Labor Standards for Teenagers

Teenage labor in the United States

Federal Law sets child labor standards affecting teenage workers in the private companies and in federal, state, and local governments.

How can injuries be prevented?

Demand Training

Insist on adequate supervision(监督)and easy access to a supervisor at all times.

Demand sufficient training on equipment and chemicals you are required to use.Refuse to use unknown materials or machinery that is broken or improperly set up.

Wear protective equipment

Always use whatever protective equipment is supplied.Protective clothing includes non-slip shoes, gloves and other specific job-related protective gear.

Request reasonable protective equipment if it is not provided automatically.

Know your environment

Ask about workplace hazards and precautions(预防措施)that can help prevent injuries.

Workplace hazards are objects and situations present at your job that could potentially hurt you.Recognize safety hazards such as slippery floors, unsafe ladders, sharp knives, and heavy lifting.

Know the law

Learn about federal and state laws governing employment for teenagers and make you’re your supervisor enforces them.

How many working hours are allowed?

Teenagers (ages 14-15) may total no more than

■3 hours on a school day.

■18 hours in a school week.(A school week is any week in which school attendance is required for any part of four or more days.)

■8 hours on a non-school day.

■40 hours m a non-school week.

What are the responsibilities?

Employers and employees share the responsibility for keeping the workplace safe and healthy.As a teenage worker, you can do your part by taking these steps:

■Follow rules.

■Use safety equipment.

■Keep your work area clean.

■Report all injuries.

■Inform a supervisor if you feel sick.

■Report safety problems.

小题1:If a teenager is asked to work with equipment out of order, he or she should       _.

A.demand enough training

B.refuse to work with the equipment

C.ignore the instructions on the machine

D.ask for necessary protective tools小题2:All of these are examples of workplace hazards EXCEPT        .

A.sharp knives

B.heavy lifting

C.slippery floors

D.steady ladders小题3:According to the passage, which of the following should a teenage worker do in the workplace?

A.Depend on his own in any case.

B.Deal with his injuries himself.

C.Contact a supervisor when feeling uncomfortable.

D.Use any tool in hand.

题型:填空题

属于ω-3多不饱和脂肪酸的成分是

A.亚油酸
B.亚麻仁油酸
C.鱼油含的DHA
D.红花油
E.玉米油

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