问题 填空题

人体所需的营养主要由消化系统(如图)摄取,据图完成下列问题:

(1)消化系统由多个器官构成,其中消化吸收的主要器官是[______]______.

(2)人的生长发育以及受损细胞的修复和更新都离不开哪类营养物质:______.请列举富含这种营养的一种食物:______.这种营养进入人体后被初步消化是在[______]______.

(3)能促进脂肪的消化,但其本身却并不含有任何消化酶的消化液是[5]______分泌的______.

(4)请你简单分析我们为什么应坚持按时吃早餐:______.

答案

由图可知:图中1食管,2胃,3胰腺,4小肠,5肝脏,6胆囊,7盲肠,8阑尾.

(1)小肠是消化和吸收主要场所,因为小肠长约5~6 m,小肠内具有肠液、胰液和胆汁等多种消化液;小肠内壁有环形皱襞,皱襞上有小肠绒毛,增大了消化和吸收的面积;小肠绒毛内有毛细血管和毛细淋巴管,都是由一层上皮细胞构成的,有利于营养物质的消化和吸收.

(2)食物中含有六大类营养物质:蛋白质、糖类、脂肪、维生素、水和无机盐,蛋白质是构成人体细胞的基本物质,对于身体的生长发育以及细胞的修复和更新有主要作用;蛋白质初步消化在胃,富含蛋白质的食物有 牛奶、鸡蛋、豆制品、瘦肉等.

(3)肝脏分泌的胆汁虽然不含有消化酶,但它对脂肪起乳化作用,使脂肪变成微小的颗粒,增加与消化酶的接触面积,从而促进脂肪的消化.

(4)合理膳食是指每日均衡的吃膳食宝塔中的五类食物;一日三餐,按时进餐;每日早中晚能量比例为:30%、40%、30%.因为早餐要为我们一上午的工作和学习提供能量

故答案为:(1)4; 小肠; (2)蛋白质;牛奶、鸡蛋、豆制品、瘦肉等;2胃 (3)5肝脏; 胆汁; (4)因为早餐要为我们一上午的工作和学习提供能量.

填空题
完形填空

根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项。其中有两项为多余选项。

Most drinks stating that they are fruit-flavored (水果味道的) contain no fruit at all, while most of the rest contain only a small quantity of fruit, according to a study carried by the British Food Commission.

“Shoppers need to check the labels (标签) before buying drinks, though sometimes the actual content can be non-existent,” said Food Commission spokesperson Ian Tokelove. “Food production is highly competitive.    小题1:   It will increase profits, and consumers won’t always realize they are being tricked.”

Flavorings are focused on the flavors of natural food products such as fruits, meats and vegetables, or creating flavor for food products that do not have the desired flavors. Researchers analyzed the contents of 28 strawberry-flavored products sold in stores.    小题2:   Of the 11 products that did contain strawberries, five of them contained less than one percent real fruit. In addition, each juice box contained nearly eight teaspoons of sugar.

  小题3:   Let’s take jam as an example. Some strawberry-flavored jam was labeled as containing no artificial colors, flavors, or sweeteners, but it contained absolutely no strawberries at all.

  小题4:   Consumers have the rights to know clearly about what they have bought. Under current UK law, food packages do not have to distinguish between natural and artificial flavoring. “Describing a product as strawberry flavor and covering the surface of the packet with pictures of strawberries is misleading.    小题5:   Unfortunately, it is also legal and widespread,” Tokelove said. “It’s time to take measures to protect the consumers’ rights.”

A.The products which contain real fruit are popular with people.

B.Even products advertised as more natural often contained no fruit.

C.They found that about 60 percent of them didn’t contain any fruit at all.

D.If companies can cut their costs by using flavoring, they are likely to do so.E. It is important and necessary to demand a small amount of flavoring in the products.

F. Actually the product contains just a tiny percentage of strawberry or even no fruit at all.

G. The Food Commission suggested all flavors used in a product should be listed on the packaging.