不同糖类形成类黑素的速度，还原性糖较非还原性糖慢。

男性，68岁，反复咳嗽、咳痰30年，活动后气短15年，右下肢水肿3年而多次入院。此次因上感后呼吸困难加重，神志恍惚，查血气分析(未吸氧时)pH7.30，PaCO89mmHg，PaO50mmHg。

呼吸衰竭患者机械通气治疗，下列描述错误的是()

A．血气分析在刚上机时每4小时1次，以后每日2次

B．血气维持在PaO2 80mmHg，PaCO2 40mmHg

C．血气维持在PaO和PaCO2 60mmHg左右

D．呼吸性酸中毒，注意改善通气

E．若出现代谢性碱中毒，可补钾和精氨酸治疗

语法填空

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空.

     In every school a "top" crowd sets the pace,while the others follow their lead.Let's say the top crowd

decides that it is smart to wear bright red sweaters.Pretty soon everybody is wearing __1__bright red

sweater.There is nothing wrong with that,__2__the fact that on some people a bright red sweater is

__3__(extreme)unbecoming.The situation can even become dangerous,if the top crowd decides that it is

smart to drink or to drive cars at seventy miles an hour.Then the people __4__(follow) the lead are

endangering their lives.They are like the sheep being led to the butcher.Now,chances are __5__you have

come across situations like these more than once in your life；chances are that one time or __6__you

probably did something you knew to be wrong.You may __7__(excuse)yourself by saying,"Gee,the

crowd does it."Well,let the crowd do it,__8__don't do it yourself.Learn to say,"No."

     Develop your own standards and your own judgment.__9__you know the crowd is planning

something you __10__(agree)with,have the courage to bow out politely.You'll have the satisfaction of

standing on your own two feet.

根据监控检查记录本要求，每日一次对监控系统进行回放检查，并及时落实措施整改检查出来的安全隐患。

运内劳宫，揉二人上马主（）

A.清心经热

B.清虚烦内热

C.清卫分热

D.清营分之热

下列关于催化蒸馏塔压力偏高时的说法不正确的是（）。

A、一定是由回流量过大引起的

B、会造成催化剂床层温度高

C、催化剂活性较低时可以将压力控制的稍高些

D、催化蒸馏塔压力的高低与催化剂床层的反应无关系