下列试剂长期敞口放置在空气中,质量会减小的是( ) A.生石灰 B.火碱 C.浓

题型:选择题

问题:

下列试剂长期敞口放置在空气中,质量会减小的是(  )

A.生石灰

B.火碱

C.浓盐酸

D.浓硫酸

考点:物质的变质生石灰的性质和用途物质的保存
题型:选择题

第三部分: 阅读理解 (共20小题;每小题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A,B,C,D)中选出最佳选项

One of the most important aspects of an image is color. People are very sensitive to color, and different colors have different effects on people .

In general , red is an exciting color , which creates an image of action, energy and danger. Red is also the most frequently used color in flags .Eighty percent of the world’s flags contain red. A study in “Germany showed that football teams wearing red are more successful .Blue is a very calm color .Business executives usually wear dark blue suits .Blue is also a peaceful color. The flag of the United Nations is light blue .Yellow is associated with openness and freedom. Green is a very relaxing color .Surgeons nowadays wear green ,because it’s less tiring than white .Black creates an image of power and authority .It can also be a very threatening color .Gangsters and vampires often wear black .white is a pure and strong color .This is one reason why doctors wear white coats .We trust them more .Grey is a very anonymous color .People wearing grey don’t want other people to notice them .Brown is the opposite of black .It’s warm and friendly ,while black is threatening .

56.What does the author mainly talk about in the passage?

A.Color and Character       B.Color and Image

C.Color and Occupation     D.People are sensitive to color

57.Which of the following is true about color according to the passage?

A.Eighty per cent of the world’s flags contain green.

B.Brown is the opposite of pink, presenting warmth.

C.Red creates an image of energy , danger and freedom.

D.Blue is a peaceful and calm color.

58.The underlined word “anonymous” roughly means ______

A.outstanding     B.beautiful C.exciting   D.unknown

题型:选择题

能说明一定是金属元素的事实是(  )

A.原子最外层只有1个电子的元素

B.在化学反应中能失去电子的原子

C.在化合物中只有正价没有负价的元素

D.能跟非金属反应的物质

题型:选择题

小强在观看2012年世界杯,在运动员射门时,他感觉到足球射向了自己,随即出现眨眼动作.眨眼也是一种反射活动,眨眼反射的神经结构和反射类型分别是(  )

A.脑,非条件反射

B.反射弧,非条件反射

C.脊髓,条件反射

D.反射弧,条件反射

题型:选择题

电介质强度这一名词指的是一个电场强度的值。

题型:选择题

下列个人所得不属于劳务报酬所得的是()。

A.个人出租住房取得的收入 

B.个人发表文学作品所得的收入 

C.个人中 * * 票获得的收入 

D.个人担任董事职务取得的董事费收入

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