问题 填空题

消化系统的组成结构中,人体最坚硬的结构位于______,消化道最膨大的部分是______,最大的消化腺是______,消化食物和吸收营养物质的主要场所是______.

答案

位于空腔内的牙齿是人体中最坚硬的器官,牙齿的结构分为牙冠、牙颈和牙根三部分.在消化道内,胃呈囊状,具有较大的伸展性,是消化道最膨大的部分,成年人的胃能容纳2升左右的食物.胃内有胃腺,能分泌胃液,胃液里面含有胃蛋白酶,能对蛋白质进行初步消化.所以胃的功能有两个:贮存食物;对食物进行初步消化;肝脏是人体内最大的消化腺,成人的肝脏重约1.5kg,大部分位于腹腔的右上部,肝脏具有多方面的功能:分泌胆汁、代谢功能和解毒功能;小肠是消化食物和吸收营养物质的主要场所,小肠很长,长约5~6m,小肠内壁有环形皱襞,皱襞上有小肠绒毛,增大了消化和吸收营养物质的面积.小肠绒毛内有丰富的毛细血管,其壁只有一层上皮细胞构成,利于吸收营养物质.小肠内有肠腺,能够分泌肠液,肠液中含有消化糖类、脂肪和蛋白质的酶,与小肠的消化功能相适应.

故答案为:口腔;胃;肝脏;小肠.

阅读理解

阅读理解。

Dear Aunty,

     I work at a supermarket, and another girl and I share tasks we must finish before leaving. But she takes

half an hour to do something I can do in ten minutes. She always has a story to tell me and stops working

when she does. My boss is angry at both of us, but it's not my fault. I don't want to rat on her, but what

else can I do?

                                                                                                                                          Flustered

Dear Flustered,

     Let me propose a better way. Make a log of all the tasks you share, then suggest to your boss that for

efficiency your duties could be divided into two separate checklists. If he's reluctant, go to plan B: the next

time this girl starts telling you a story, stop working to listen and call your boss over to hear what a great

storyteller she is. I'm sure he'll take it from there. 

                                                                                                                                          Aunty

Dear Aunty,

     I'm a college student in the Philippines who wants to be wise with money. I'm not an economics or

business major student and I don't know anything about stocks. But I really want to buy assets and invest.

I receive about 15,000 pesos every school term from my educational plan. I don't have any idea how I should

spend it. I don't want to just buy new clothes, or hang out with my friends because it would not be wise. I

want my money to grow. Please enlighten me. 

                                                                                                                                       Fastbreakplay

Dear Fastbreakplay,

     Being wise with money is the No. 1 thing to learn. Start with a disciplined and systematic savings plan.

When your savings reach a sizeable amount, then you may start investing. In the meantime, invest in yourself

by reading up on stock markets and capital markets. Follow the news. Before I started investing during my

senior high school years, I had already studied stock market data of the past century as I believe markets tend

to repeat themselves. If you master this skill, you will master your reading of the markets.

                                                                                                                                                  Aunty

1. When Flustered's boss isn't willing to separate their work, Flustered can _____.

A. follow the second advice

B. invite the boss to listen to the girl

C. stop working or do other things

D. report to the boss on time

2. Fastbreakplay writes a letter to Aunty in order to _____.

A. buy some pesos

B. become an expert on stocks

C. get ways to grow money

D. study economics as his major

3. In Aunty's opinion, one should _____ at the beginning to be wise with money.

A. start investing

B. have a savings plan

C. study stock markets

D. master market reading

4. From letters above, we know Aunty should be _____.

A. an elder kind woman

B. a name of a columnist

C. a famous singer

D. a lady in the community

单项选择题