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问题 多项选择题

在用计量器具经检定不合格后，不能发给（）。

A、检定证书

B、检定结果通知书

C、检定合格证

答案

参考答案：A, C

阅读理解
阅读下列短文，从各题A、B、C、D中选出能回答所提问题或完成所给句子的最佳答案。
                            Welcome to the zoo
Opening time:                                           Price:
From Monday to Friday                            Adults: ￥20
8:30 a.m.—5:30 p. m.                               Children: ￥10
On Saturday＆Sunday
8:30a.m.—6:00 p.m.
Location: Chongqing Street, Laoshan District (区), Qingdao City
1. The zoo opens _____ a week.
    A. two days        
    B. five days        
    C. six days    
    D. seven days
2. On Tuesday, the zoo closes at _____.
    A. 5:30 p.m.      
    B. 6:00 p.m.      
    C. 6:30 a.m.  
    D. 8:30 a.m.
3. On Wednesday, the zoo is open for_____.
    A. 8 hours          
    B. 8.5 hours        
    C. 9 hours    
    D. 9.5 hours
4. The zoo is in the city of _____.
    A. Qingdao    
    B. Shandong        
    C. Laoshan  
    D. Chongqing  
5. Beibei is 11 years old, and this Sunday she wants to visit the zoo with her parents. How much should
    they pay for the tickets?
    A.￥20.    
    B.￥30.    
    C.￥40.    
    D.￥50.
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多项选择题

按规定烘干焊条可防止（）焊接缺陷。

A、气孔

B、热裂纹

C、未焊透

D、冷裂纹
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