探究与发现。问题:在除法算式中,被除数和除数同时乘或除以相同的数,商会有什么变化

题型:解答题

问题:

探究与发现。
问题:在除法算式中,被除数和除数同时乘或除以相同的数,商会有什么变化规律?
步骤:
1.比一比,填一填。
125÷25=(    ) (125×2)÷(25×2)=(    )
7000÷125=(    )(7000×8)÷(125×8)=(    )
5600÷800=(    )(5600÷ 100)÷(800÷100)=(    )
2.观察上面的算式,说一说被除数、除数、商有什么变化? 
3.讨论:要使商不变,被除数和除数都乘0或者除以0可以吗?为什么?
4.结论是什么?
考点:和差积商的变化规律找规律
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颅内压增高时颅内压的调节主要通过以下的()。

A.脑血管的自动调节

B.脑血流量减少

C.颅腔内脑脊液量的减少

D.脑组织移位

E.颅腔容积扩大

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下列句子横线上应填入的最恰当的一项是[ ]

①我没有判断明白,便妄下断语___________了一只不能说话辩诉的动物。

②那只花白猫对于这一对黄鸟,似乎也特别注意,常常跳在桌上,对鸟笼___________着。

③三妹想着种种方法逗它,它都不理会。我们都很替它___________。

④我永无改正我的___________的机会了!

A.冤枉  注视  郁闷  过错

B.冤苦  凝视  忧郁  错失

C.冤苦  凝望  忧郁  过失

D.冤屈  注目  憋闷  错误

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A new study suggests that the round-the-clock(24小时不断的)availability that cell phone have brought to people’s lives may be taking a toll on family life.The study,which followed more than 1,300 adults over 2 years, found that those who consistently used a mobile phone throughout the study period were more likely to report negative “spillover’’ between work and home life—and,in turn, less satisfaction with their family life.

Spillover essentially(本质上)means that the line between work and home begins to become unclear.Work life may invade home life when a parent is taking job—related calIs at home,for instance--or family issues may start to take up work time.For example,a child may call mom at work,telling her "microwave exploded” explained Noelle Chesley,an assistant professor of sociology at the University of Wisconsin—Milwaukee and the author of the study. The problem with cell phones seems to be that they are allowing for ever more spillover between work and home.   

This may be especially true for working women,the study found. Among men,consistent use of mobile phones seemed to allow more work issues to creep (潜入)into family time.But for women,the spillover tended to go in both directions. Being “connected” meant that work cut into home time,and family issues came into work life. 

Cell phones seem to be opening more lines for stressful exchanges among family member.But there may be ways to control the spillover,according to Chesley.Employers, she said,could look at their policies on contacting employees after hours to make sure their expectations are “reasonable”.For their part,employees could decide that cell phones go off during family time, Chesley said. 

64.What does the underlined phrase “taking a toll on’’ probably mean in Paragraph 1?

A. Explaining.   B. Influencing.    C. Damaging.   D. Extending      

65.According to Chesley,what is the best solution to the problem caused by cell

phones?

A. Refuse to use cell phones.

B. Separate work hours from family time.

C. Ignore coming calls during family time.

D. Encourage women to stay at home.

66.We can learn from the passage that ___________________.

A.spillover makes the line between work and home unclear

B.cell phones seem to be convenient to families

C.cell phones affect men as much as women

D.we can do nothing to solve the problem

67. What is the main idea of the passage?

A .How to control the negative spillover caused by cell phones.

B. Cell phones cause negative “spillover’’ between work and home life.

C. Consistent use of cell phones makes people feel less satisfied with their work.

D.How work life invades home life.

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伤寒、副伤寒预防原则为

保护易感者()

A.对有关人员进行主动免疫(流行区旅游者、清洁工人、带菌者家属、实验室与医务人员)

B.不必进行预防接种

C.对患者进行免疫

D.对行政管理人员注射

E.对妇女、儿童进行接种

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根据《票据法》的规定,( )经原记载人更改后,加盖印章,汇票是有效的。

A.银行汇票金额
B.银行汇票日期
C.银行汇票记载的支付地点
D.银行汇票收款人名称

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