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问题 单项选择题

某钢梁牌号不同，其他条件均相同，在充分发挥材料强度的前提下，Q235钢梁的最小高度hmin( )Q345钢梁的hmin。

A．大于
B．小于
C．等于
D．不确定

答案

参考答案：B

解析： 本题主要考查的知识点为梁的最小高度的确定。
[要点透析] hmin=0.16fl2/[vr]E，E为弹性模量，Q235的弹性模量高于Q345，所以Q235的hmin，小于Q345铜梁的hmin。故选B。

单项选择题 共用题干题

老年男性，反复咳嗽咳痰4～5年，近2个月来病情加重，痰量多，青、链霉素治疗效果欠佳。查体：背部双下肺野可闻及细湿啰音；WBC8.6×109/L，N0.76。

为指导治疗，下列哪项检查最有意义（）

A.胸部X线检查

B.痰培养

C.CT

D.支气管镜

E.血培养
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改错题
短文改错。以下标有题号的每一行均有一个错误，请找出，并按下列情况改正：
此行多一个词：把多余的词用斜线（﹨）划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号（∧）,在该行右边横线上写出该加词。
此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
    In the age of three, many children go to nursery school. Two       
or three years later, they enter in a primary school. Several years  
later they go to a secondary school. In some countries this called a 
high school. Children remained at their secondary school until they  
are between 16 and 18. Then they may have a chance of continue     
their study at a university and college. Universities and colleges  
are places that some young people go to continue their education   
after leaving high schools. Most university student study one main  
subject, though we may also study a number of others. Teaching     
is usual by lectures, or by discussions between a lecturer and    
a group of students.                                                  		1.__________     
2.__________     
3.__________     
4.__________       
5.__________    
6.__________     
7.__________                            
8.__________     
9.__________     
10.__________   
  
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