从基底层到角质层含量逐渐减少的是()A.胆固醇 B.脂肪酸 C.磷脂 D.神经酰胺

题型:单项选择题

问题:

从基底层到角质层含量逐渐减少的是()

A.胆固醇

B.脂肪酸

C.磷脂

D.神经酰胺

考点:皮肤与性病学(医学高级)皮肤与性病学综合练习皮肤与性病学综合练习题库
题型:单项选择题

阅读理解。

     Nowadays, in the United States and other western countries, some teens are choosing to become

vegetarians.  That is, they choose not to eat meat.  There are many types of vegetarians, some of whom

don't even eat animal products such as milk, eggs, or yogurt. Having balanced meals is very important,

especially for teens who are growing up. So why are they becoming vegetarians? Well, they choose to

become vegetarians for different reasons. The most popular reason is just wanting to be healthier.

     I decided to become a vegetarian when l was 10 years old,  and it was much easier than you might

think.  But as a vegetarian,I have had a difficult time getting the proper  nutrition. Most doctors and

scientists say that being a vegetarian is very healthy, but many people aren't choosing the correct food

to supplement the protein in meat.

     If you're thinking about becoming a vegetarian, make sure that you pay attention to your diet very

carefully.  And of course, pay special attention to your health when doing so. Being a vegetarian isn't

for everyone, so don't be discouraged if you can't give up hamburgers and meat dumplings! Vegetables

play an important role in people's daily meals, so even if you are not a vegetarian, they are still good for

you.

1. Some teens choose to become vegetarians mainly because_______. 

A.  they have no meat to eat    

B.  they want to keep healthy

C.  they only like vegetables    

D.  they can grow up quickly

2. If you decide to become a vegetarian, you should _______.

A.  eat only vegetables    

B.  do more exercise

C.  become more careful in everything    

D. get the proper nutrition

3.  Which is the best title of this passage?

A. Becoming a vegetarian    

B.  Eating no meat

C.  Paying attention to your diet carefully

D.  Protecting animals

题型:单项选择题

作为整个应用程序入口点的主程序至少应具有下列功能( )。

A.初始化环境

B.初始化环境、显示初始用户界面

C.初始化环境、显示初始用户界面、控制事件循环

D.初始化环境、显示初始用户界面、控制事件循环、退出时恢复环境

题型:单项选择题

下列分子能穿过细胞膜的是 [ ]

A.淀粉

B.脂肪

C.蛋白质

D.氨基酸

题型:单项选择题

简述报纸星网的三个层次。

题型:单项选择题

以上对血流动力学影响最大的是()

A.心房扑动

B.房颤

C.阵发性室上性心动过速

D.阵发性室性心动过速

E.窦性心动过缓

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