问题 选择题

原尿、血浆、尿液中均含有的物质是( )

A.水、无机盐、尿酸、尿素

B.水、无机盐、葡萄糖、尿素

C.水、葡萄糖、尿酸、尿素

D.水、无机盐、尿素、蛋白质

答案

答案:A

题目分析:血液包括血细胞和血浆,血细胞包括红细胞、白细胞和血小板,血浆中90%的成分是水,另外还有血浆蛋白、葡萄糖、氨基酸、无机盐等,而尿的形成过程:血液流经肾小球时,血液中的尿酸、尿素、水、无机盐和葡萄糖等物质通过肾小球的过滤作用,过滤到肾小囊腔中,形成原尿,当原尿流经肾小管时,原尿中对人体有用的全部葡萄糖、大部分水和部分无机盐,被肾小管重新吸收回到肾小管周围毛细血管的血液里,原尿经过肾小管的重吸收作用,剩下的水和无机盐、尿素和尿酸等就形成了尿液,所以三者都有的物质为:水、无机盐和尿素。

点评:本题考查血血浆、原尿和尿液的区别,难度不大,可以结合血浆的成分和尿的形成进行解答。

阅读理解

阅读理解

     Kids are bombarded(攻击) with advertisements from every possible source: boards, clothes, walls, TV, websites

and radios. Often, even though kids don't have their own income yet, this advertising is aimed directly at them.

     Many parents have no idea that their 3-year-old children like McDonald's golden arches. Morns and dads are also

shocked when their 12-year-old children insist on(坚持) having Nike sports shoes. The businessmen give kids the

message: This product is for you. This is what you need. Nothing else will satisfy you.

     How can parents better understand and guard against this?

     Scientists show that children are a rich market for business. How much money is spent on promotion(推销活动)

to children each year? And what are kids spending their money on?

     When finding out what businessmen do to persuade your children to want something, you should know how to

teach your kids the ins and outs of buying and saving. For example, try a couple of family activities, and read through

some helpful tips. Businessmen have more than one way to win a child. Will the world of advertising change for your

child as he or she grows older?

1. Where can kids see or hear the ads?

    ________________________________________________________

2. Why do the businessmen like to spend much on promotions to children?

    ________________________________________________________

3. What will 12-year-old children do after they are bombarded With ads?

    ________________________________________________________

4. What's the message that businessmen give children?

    ________________________________________________________

5. What should parents do to guard against ads?

    ________________________________________________________

选择题