问题 单项选择题 B型题

()是肠外营养的主要能源物质。

A.葡萄糖

B.脂肪乳剂

C.复方氨基酸

D.维生素

E.微量元素

答案

参考答案:A

解析:葡萄糖是肠外营养中最主要的能源物质,其来源丰富,价廉,无配伍禁忌,符合人体生理要求,省氮效果肯定。脂肪乳剂是肠外营养的另一种重要的能源物质,大多以大豆油或红花油为原料,可提供能量、生物合成碳原子及必需脂肪酸。氨基酸是肠外营养的氮源物质,是机体合成蛋白质所需的底物。同时肠外营养需补充电解质、维生素和微量元素,其中维生素包括脂溶性和水溶性两类。电解质对维持机体水、电解质和酸碱平衡,保持人体内环境稳定,维护各种酶的活性和神经、肌肉的应激性均有重要作用。维生素及微量元素是维持人体正常代谢和生理功能所不可缺少的营养素。

阅读理解

阅读下面的短文,并完成短文后的任务。

Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.

Waste can bring a lot of problems. Although China is rich in some resources (资源), we are short of others, for example, fresh water. It is reported that we will have no coal(煤) or oil to use in 100 years. So if we go on wasting our resources, what can we use in the future and where can we move? Think about it. (83) I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.

In our everyday life, we can do many things to prevent (阻止) waste from happening, for example, turn off the water taps when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will be changed. (84) Waste can be stopped one day, if we do our best.

任务1:根据要求答题。(请注意问题后的词数要求) 提示: within 在…以内  waste浪费

小题1:List the wastes mentioned in the first passage: (within 15 words 15个词以内)

_________________________________________________________________

小题2:What problems can waste bring? (within 20 words)

(1) ______________________________________________________________

(2) ______________________________________________________________

任务2:将短文中划线的句子翻译成汉语。

小题3:______________________________________________________________

小题4:______________________________________________________________

任务3:请给短文拟一个适当的标题:(within 5 words)

小题5:______________________________________________________________

单项选择题