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26. It was ______ that they all went swimming in the river.

A. such a hot weather          B. such hot weather

C. so hot weather            D. so hot a weather

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25. -I came here by taxi and the driver ________ me 50 yuan.

    -Really? You ________ by bus.

A. paid; should come          B. cost; should have come

C. charged; ought to have come       D. spent; ought to come

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24. When we were young, every evening my brother and I ___ stay at home waiting for our mother.

A. would   B. might    C. should     D. could

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23. _________ Mr. Rowan Atkinson acts as different comic characters , he is more famous around the world _______ Mr. Bean .

    A. Because ; for                     B. Though ; to       

    C. Although ; as                   D. Even though ; by

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21. ---I’m afraid I must be off now .    --- ____________________ . 

    A. No problem        B. Never mind        C. Step slowly     D. See you soon. 22.-Daddy, can you buy me a new MP3 when you go to Beijing?

  -You ______ get one if you are admitted to a key middle school.

A. could    B. shall    C. may      D. can

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25.在学校开展的结合实践活动中,某班进行了小制作评比,作品上交时间为5月1日至31日,评委会把同学们上交作品的件数按5天一组分组统计,绘制成频率分布直方图,如图所示,已知从左至右各长方形高的比为2:3:4:6:4:1,第三组的频数为12,请解答下列各题:

   (1)本次活动共有多少作品参加评比?

   (2)哪组上交的作品中数量最多?有多少件?

   (3)经过评比,第四组和第六组分别有10件、2件作品获奖,问这两组哪组获奖率较高?

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24.某公司10名销售员,去年完成的销售额情况如下表:

销售额(单位:万元)
3
4
5
6
7
8
10
销售员(单位:人)
1
3
2
1
1
1
1

   (1)求销售额的平均数、众数、中位数(单位:万元).

   (2)今年公司为调动员工积极性,提高年销售额,准备采取超额有奖的措施,请根据(1)的结果,通过比较合理确定今年每个销售员统一的销售额标准是多少万元?

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23.将10盒同一品种的花施用甲、乙两种保花肥,随意分成两组,每组5盆,其花期的记录结果如下(单位:天).

编号
1
2
3
4
5
甲组
23
25
27
28
22
乙组
24
24
27
23
27

  (1)施用哪种花肥,使得花的平均花期较长?(2)施用哪种保花肥效果比较可靠?

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