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问题 填空题

所谓化学清洗，就是在碱洗、酸洗、钝化等几个工艺过程中使用某些化学药品溶液除掉锅炉（）系统中的各种沉淀物质，并在金属表面形成很好的防腐（）。

答案

参考答案：汽水；保护膜

阅读理解

阅读理解。

     When (当……时候) the Spring Festival comes, boys and girls are very happy. They put on their beautiful clothes

and spend the days with their family. They can also receive red packets and presents. People like to have a big family

dinner at New Year.   There is a lot of food. It's very nice.   And they usually eat jiaozi at New Year.   They go to their

friends' house and say"Happy New Near"to them. 

1. Boys and girls can receive _____ during the Spring Festival.     

A. red packets    

B. presents

C. red packets and presents   

 2. Chinese like to eat _____ at New Year.      

A. yuanxiao        

B. moon cakes

C. jiaozi   

 3. People usually have a big dinner with their _____ at New Year.  

A. friends    

B. workmates(同事)

C. family 

4. People usually go to see their friends and say "______" to them during the Spring Festival.  

A. Happy New Year  

B. Happy Birthday    

C. Happy Christmas

5. The Spring Festival usually comes in _____.   

A. February

B. August

C. October
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单项选择题

有如下程序：
#include＜iostream＞
using namespace std;
class BASE
public:
～BASE()cout＜＜"BASE";
;
class DERIVED:public BASE
public:
～DERIVED()cout＜＜"DERIVED";
;
int main()DERIVED x;return 0;
执行后的输出结果是( )。

A．BASE

B．DERIVED

C．BASEDERIVED

D．DERIVEDBASE
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