下列四种装置中,均盛200mL的溶液。 ①0.005 mol/LCuSO4溶液,

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问题:

下列四种装置中,均盛200mL的溶液。

①0.005 mol/LCuSO4溶液,②0.01 mol/LH2SO4,③ZnCl2溶液,④KCl溶液.

(1)上述四种装置中,为电解池的是             (用编号回答),装置①中两电极的电极反应式分别是:阴极:                ,阳极:               

(2)若将装置④中的外加电源拆去,用导线将两个电极连接,则Fe极上发生的反应是___________________,C极上发生的反应是                  

(3)工作一段时间后,测得导线上均通过0.002mol电子,则上述装置②中生成气体的体积是________ mL  (标准状况);

考点:电解池原理电解池电极反应式的书写
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婴儿均化食品,成分含量为21%猪肉(可见小肉块),40%马铃薯,30%菊苣属蔬菜,9%其他配料,净重250克,零售包装

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绝缘靴每隔()年应进行一次电气试验。

A.二年

B.一年

C.半年

D.三个月

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Watercolour is the oldest paints known. It dates back to the early cave men who discovered they could add lifelike qualities to drawings of animals and other figures on the walls of caves by mixing the natural colours found in the earth with water.

Fresco (壁画), one of the greatest of all art forms, is done with watercolour. It is created by mixing paints and water and applying these to wet plaster (灰泥). Of the thousands of people who stand under Michelangelo’s heroic ceiling in the Sistine Chapel, very few know that they are looking at perhaps the greatest watercolour painting in the world.

The invention of oil painting by the Flemish masters in the fifteenth century made fresco painting go down-hill, and for the next several centuries watercolour was used mainly for doing sketches (草图) or as a tool for study. It was not until the eighteenth and nineteenth centuries that English painters put back watercolour as a serious art form. The English have a widely-known love for outdoors and also small private pictures. The softness of watercolour had a remarkably strong attraction for them.

The popularity of watercolour continued to grow until the twentieth century. The United States passed England as the center for watercolour, producing such well-known watercolour artists as Thomas Eakins and Andrew Wyeth.

小题1: The purpose of the passage is to introduce _____. 

A.the gradual weakness of fresco painting

B.oils’ power or influence over watercolour

C.the discovery of watercolour in England

D.the start and development of watercolour小题2: In the 16th and 17th centuries the artists thought _____.

A.watercolour was softer, and thus better

B.oil painting lasted longer, and was better

C.watercolour wasn’t fit for finished works

D.watercolour was too hard to use in any works小题3:According to the passage, watercolour painting was put back in England because ____

A.it was easy to use outdoors

B.it was a strong medium

C.it was extremely bright in colour

D.it was suited to popular tastes小题4:What would the next paragraph most probably deal with?

A.The works of famous US watercolour artists

B.Modern American oil painters

C.The weakness of oils as popular paints

D.Techniques of producing watercolour

题型:填空题

异丙肾上腺素静脉注射,血压的变化是

A.收缩压和舒张压均缓慢而持久的升高
B.收缩压上升,舒张压不变或稍下降
C.收缩压上升,舒张压上升,脉压变小
D.收缩压上升,舒张压上升不多,脉压增大
E.收缩压上升,舒张压下降,脉压增大

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安死术常用方法之一为颈椎脱位法,常用于()。操作者将动物放在实验台上或饲养笼盖上,一只手抓住动物尾根,另一只手动作很快地按住动物的颈部,用力向后上方拉尾,动物脊柱断开,动物立即死亡。

A.大小鼠

B.家兔

C.犬

D.猴

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