问题 选择题

食物的下列成分中不经消化都能被人体直接吸收的一组是(  )

A.水、脂肪酸、淀粉

B.维生素、葡萄糖、无机盐

C.甘油、无机盐、蛋白质

D.氯化钠、氨基酸、纤维素

答案

食物中的糖类(淀粉)、蛋白质和脂肪等营养物质在消化道内在各种消化酶的作用下,最终被分解为葡萄糖、氨基酸、甘油和脂肪酸,这些营养物质人体可以吸收利用.因此能够被人体消化道吸收的营养物质是维生素、水、无机盐、葡萄糖、氨基酸、甘油和脂肪酸.

A、淀粉必须被消化为葡萄糖后才能被人体吸收,故不符合题意.

B、维生素、葡萄糖、无机盐都是小分子的、溶于水的物质,人体可以直接吸收利用,故符合题意.

C、蛋白质必须被分解为氨基酸后才能被人体吸收利用,故不符合题意.

D、纤维素是自然界中分布最广、含量最多的一种多糖,占植物界碳含量的50%以上;人类消化道内没有分解纤维素的酶,因此人体不能吸收、利用纤维素.故不符合题意.

故选:B

阅读理解

As people were rushing up to get cards for Mother’s Day 2006, the editors of Insparenting. Com had a big question inside their mind, “What is a mother to you?” They feel every person has different opinions about a woman called “mother”.

In one of the designs of Hallmark’s latest Mother’s Day cards, it describs, “mother” is a woman who makes this world a warm and happy place. At the other card, a “mother” is described as a woman who puts her home and family first, and if she is tired, she never lets it out.

What will other people say? To find out that, on this Mother’s Day(May 14th, 2006) , Insparenting. Com launches a new survey “ What Is A Mother to You?”.

According to the editor of Insparenting. Com, Adwina Jackson, Mother’s Day is a special day for everyone! That is why her team uses this day to honor mothers all over the world by launching a survey about “mother”. “This survey is also to express thanks or gratitude and to show appreciation for friends, family who are mothers, as well as other important women who have had a mothering influence,” said Jackson

Using sophisticated database technology(先进的数据库技术), Insparenting. Com will pubish the answer to “ What Is a Mother to You?” once responses to its survey have been tabulated(制成表格)from around the world. This survey is for everyone, all age, all gender and all status. All paricipates in the survey will be added to a special noticification list altering when survey results are published.

小题1: Insparenting. Com observes Mother’s Day 2006 by______.

A, sending cards to mothers all over the world

B. launching a theme survey around the world

C. publishing people’s opinions about “mother”

D. designing cards with praising words on both sides

小题2: Which of the following is not the possible reason for Insparenting. Com to launch a survy about “mother”?

A.To honour mothers all over the world.

B.To express thanks for their friends and family who are mothers.

C.To show appriciation for those who have had mothering influence.

D.To find out how many people love their mothers.小题3: What does the underlined word “gratitude” probably mean?

A.honor

B.respect

C.appriciation

D.praise小题4:What are the results of the survey?

A.People have different opinions about “mother”.

B.“Mother” is a woman who makes the world warm and happy.

C.“Mother” always puts the interest of her family before her owns.

D.The results haven’t been published so far.小题5:What is the suitable title for the passage?

A.Mother’s Day 2006, World Survey

B.How to Celebrate Mother’s Day

C.Making Cards for Mother’s Day

D.What Is a Mother to You

单项选择题 A1型题