假设某国国际收支平衡简表如下所示：(单位：亿美元) 货物出口 2000 货物进口 1

有关ADCC，正确的有（）

A.是NK细胞的一种功能

B.基本机制是NK细胞表面表达IgGFc的受体

C.慢性肝炎时增高

D.自身免疫性疾病时降低

E.介导的细胞毒的特异性由抗体决定

阅读理解。

     Why are people interested in eating raw foods or whole foods? One reason is that eating these types

of food reduces the risk of acid accumulation in your body.

     Raw and whole foods are usually digested more efficiently than cooked and refined foods. When we

cook foods, we destroy the natural enzymes (酶) that are part of the food in its raw form. These

enzymes were intended by nature to help us digest the food. When we consume food without these

natural enzymes, our bodies either digest the food improperly or allow too many nutrients to be absorbed

into the bloodstream. In both instances, the result is obesity. When too many nutrients are absorbed at

once, the body grows fat. Improperly digested food moves slowly through the digestive tract, where it

becomes increasingly acidic. To protect its vital organs from this acidic waste, the body changes the acid

into fat and stores it safely away from the organs.

     Processed foods contain chemical elements, which might confuse the appetite mechanism that tells us

when we've had enough to eat; as a result, people often overeat. Processed foods also upset the

digestive cycle. The body will either identify these foods as allergens and then store them safely away

from the organs as fat, or the remains of undigested food will become acidic and enter the bloodstream

as acid waste, which will stick to the blood vessel walls and block the passage of vital oxygen and

nutrients heading for the body's cells. The body's metabolism (新陈代谢) becomes inactive, and the

result is weight gain and obesity.

The accumulation of acid in the digestive tract makes digestion increasingly inefficient. When that happens, even healthy foods can become acidic and the food allergies will become more common.

     To stop this vicious circle in its tracks, people need to consume food and supplements that will

neutralize the acid already accumulated in body. Eating the right types of raw and whole foods can help.

It's also important to restore your enzyme balance. You need to identify and avoid the foods that cause

acid accumulation and consume the foods that increase enzyme production. If you truly want to change

and help your body heal itself, you need to take an active approach.  

1. It can be inferred from Para. 2 that _______.  

A. foods with natural enzymes help people keep fit

B. we'd better be cautious about raw and whole foods

C. it is essential for people to protect their vital organs

D. giving up cooked and refined foods is a new lifestyle

2. Processed foods are unhealthy because they _______.  

A. destroy body's cells

B. may lead to obesity

C. are difficult to digest            

D. stop body's metabolism.

3. What is the main purpose of this passage?  

A. To warn people of the problem of obesity.

B. To advocate eating more raw and whole foods.

C. To inform people of the harm of processed foods.

D. To tell the differences between raw and processed foods.

4. What is likely to be talked about following the last paragraph?  

A. Different causes of acid accumulation.

B. Correct ways to cook raw foods.

C. Suitable types of raw and whole foods.    

D. Active approaches to avoid acid.

与糖尿病密切相关的外耳道炎是（）。

A.外耳道湿疹

B.外耳道耵聍栓塞

C.局限性外耳道炎

D.弥漫性外耳道炎

E.坏死性外耳道炎

简述“陶冶教育法”的概念。

一位运动员正在跑上斜坡，如图所示，运动员受到的力有（空气阻力忽略不计）（）

A.重力、压力

B.重力、支持力

C.重力、支持力、摩擦力

D.重力、支持力、压力