下列依次作为遗传信息的携带者、膜结构基本支架的化合物组合是[ ] A.糖类、脂类

题型:选择题

问题:

下列依次作为遗传信息的携带者、膜结构基本支架的化合物组合是[ ]

A.糖类、脂类

B.核酸、磷脂

C.糖类、核酸

D.蛋白质、磷脂

考点:脂质的种类和作用核酸的组成和功能
题型:选择题

Is it true ?

1.Wearing the wrong type of glasses will do harm to your eyes .

This is not true for adults , although incorrect glasses may not be good for children under 10 . Ready-made glasses , and not wearing when you should , won’ t do harm to your eyes , but you may see better with glasses that are specially made for you .

2.Watching too much television is bad for you eyes .

This is not true. People with easily affected eyes may find they get red and aching from staring at a fixed distance for long periods , but there won’ t be any lasting effects .

3. Carrots will help you see in the dark. Carrots are rich in beta-carotene, which the body can change into vitamin A, too little of which can cause night blindness. However , people in most countries don’ t need to worry about vitamin A deficiency(缺乏), night blindness is more likely to be connected with another vision problem .

小题1:According to the passage , which of the following is TRUE ?

A.Ready-made glasses will do harm to one’s eyes.

B.Wearing the wrong glasses may do harm to children’s eyes.

C.The human body is unable to change beta-carotene into vitamin A.

D.Watching less television may do harm to children’s eyes.

小题2:Night blindness is most likely caused by _____ .

A.staring for long periods

B.too much beta-carotene

C.not enough vitamin A

D.vision problems小题3:According to the article , eye problems can be corrected by _____ .

A.wearing specially-made glasses

B.performing eye exercises

C.cutting back on television

D.eating more carrots小题4:Watching too much television can cause _____ .

A.night blindness

B.lasting eye problems

C.a number of vision problems

D.eye trouble for a limited time小题5:The main purpose of this article is to _____ .

A.tell people of the importance of their eyes

B.tell people how to protect their eyes

C.tell people to have more carrots

D.tell people something more about their eyes

题型:选择题

某6个月小儿,低热1天伴咳喘,吃奶中有呛咳,哭闹时唇周轻度发绀。查体:T38℃,气促,呼吸50次/分,规则。精神及面色尚可,呼气相延长,两肺呼吸音对称,有较多哮鸣音,心率160次/分,心音强,肝肋下2.5cm。

提示:门诊血常规检查正常范围。提问:为明确诊断,应进一步进行哪些检查()

A.呼吸道病原检测

B.查血气分析

C.摄X线胸片

D.检查肺功能

E.过敏原检测

F.胸部CT

题型:选择题

羊药浴应注意什么问题?

题型:选择题

法洛四联症的超声改变有()

A.主动脉增宽骑跨于室间隔

B.主动脉前壁与室间隔连续中断

C.房间隔缺损

D.右心室流出道梗阻

E.右心室肥厚

题型:选择题

左边是给定纸盒外表面,下面哪一项能由它折叠而成()

A.A

B.B

C.C

D.D

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