地方性甲状腺功能低下症的主要病因是() A.甲状腺素合成障碍 B.甲状腺不发育 C.

题型:单项选择题

问题:

地方性甲状腺功能低下症的主要病因是()

A.甲状腺素合成障碍

B.甲状腺不发育

C.母亲在孕期服用抗甲状腺药物

D.促甲状腺激素缺陷

E.母亲孕期饮食中缺碘

考点:儿内科(医学高级)儿内科综合练习儿内科综合练习题库
题型:单项选择题

下列选项中是正常眼的是(  )

A.

B.

C.

D.

题型:单项选择题

饲料、饲料添加剂企业生产的饲料、饲料添加剂,经检验合格的,应当附具产品质量检验合格证。

题型:单项选择题

阅读理解。

     There's no doubt that fast food has become an important part of modern life, especially among teenagers.

According to research, in the UK 80% of meals are eaten outside the home. And more than 50% of teenagers

eat, on average, more than one hamburger every three days. The percentage is high and nutritionists (营养专

家) are worried, but is fast food really as harmful as they say it is?

     Here is what two experts, Jake Hyde and Ursula Birkbeck, have to say on the subject. " Fast food is junk

food," says Jake Hyde.

     "Fast food is of very little nutritional value. It is full of fat, especially the harmful type, which is found in

meat, butter, cheese and mayonnaise. We need to cut down on fat if we want to stay healthy. Another thing

is that fast food contains too much salt and sugar and too many additives (添加剂 ). It is also low in vitamins

and fiber, because it includes hardly any vegetables. As a result, it doesn't provide us with enough nutrients,

just lots of calories. Most teenagers who have made fast food an important part of their diet are overweight.

This, along with the fact that they hardly ever take any exercise, puts their health at risk. It can lead to serious

health problems like heart disease or diabetes."

     "People shouldn't feel guilty every time they have a burger," says Ursula Birkbeck." What is in it not that

bad. Don't forget that red meat is a good source of iron and cheeseburgers (干酪汉堡包 ), for instance,

contain calcium. Chips, which most people think are unhealthy, are not so bad after all, because potatoes are

rich in Vitamin C. However, we shouldn't eat too much sauce or mayonnaise. Nowadays, fast food restaurants

pay attention to health matters and nutrition. They have improved the quality of their food, use fewer additives,

vegetable oil for cooking and some even use low-fat products. Also, most places offer salad bars, which give

people the chance to balance fast food with vegetables that contain other nutrients. So, people don't need to

prevent fast food from their diet completely. It's all a matter of what type of fast food they choose to eat, how

often and what else they eat during the day."

1. From the first paragraph we know that _____.

A. it's doubtful that fast food has become an important part of modern life

B. most meals in the UK are eaten inside the home

C. over half of the British teenagers average over one hamburger every three days

D. nutritionists are sure that fast food is very harmful

2. The underlined word "mayonnaise" in Paragraph 3 is a type of ______.

A. fat

B. food

C. meat

D. additive

3. The difference of the two experts' opinions lies in ______ .

A. whether fast food has little nutritional value

B. whether fast food is full of fat

C. whether fast food has improved its quality

D. whether fast food restaurants pay attention to health matters

4. What would be the best title for the passage?

A. Fast food-junk food

B. Fast food-friend or enemy?

C. Which expert is right?

D. The fast food restaurants are improving

题型:单项选择题

患者,男,9岁,口腔检查发现上颌左侧区有恒中切牙,恒侧切牙,乳尖牙,第一乳磨牙,第二乳磨牙及第一恒磨牙。其中第一恒磨牙牙合面龋坏,无自发性痛史,要求治疗。此患者牙列属于()。

A.恒牙牙合期

B.乳牙牙合期

C.牙列缺损期

D.混合牙牙合期

E.以上都不是

题型:单项选择题

“转换压缩文件格式”命令在WinRAR()菜单中。

A.文件

B.命令

C.工具

D.选项

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