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问题 单项选择题

服用抗酸药宜在( )

A．餐前1小时
B．餐前半小时
C．进餐时
D．餐后1小时
E．餐前餐后均可

答案

参考答案：D

解析： 服用抗酸药宜在餐后1小时，此时胃内胃酸分泌增加，可以更好地发挥药效。

选择题

某小组为研究电化学原理，设计如图装置。下列叙述不正确的是

[ ]

A．a和b用导线连接时，正极发生的反应：Cu2+ +2e- ==Cu

B．a和b不连接时，铁片质量会增加，原因是发生：Cu2+ + Fe = Cu + Fe2+ 

C．无论a和b是否连接，铁片均被腐蚀，溶液从蓝色逐渐变成浅绿色

D．a和b分别连接电源正、负极，Cu电极发生的反应：4OH--4e-  == 2H2O + O2↑ 

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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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