练习册

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    数词:(1)掌握基数词和序数词的形式及用法,(2)掌握hundred/thousand/million等在具体数量修饰和不定数量中的运用,(3)熟练掌握时间及日期的表达方式. 【查看更多】

     

    题目列表(包括答案和解析)

    用适当的代词或数词填空。
    1. The boy is crying. I think ________ is hungry and wants ________ mother.
    2. Helen is a student and Miss Smith teaches ________ English.
    3. I'm old enough now. I can finish the work by ________.
    4. Come on Monday or Wednesday. ________ day is OK.
    5. —Are the keys ________, girl?
        —No, they are not ________.
    6. Obey the traffic rules and learn to protect yourself. ________ is more important than life.
    7. —What _______ do you want to have?
        —Thanks, that's enough.
    8. Xiao Li is the right person who shows the foreigners around, for ________ of us can speak English.
    9. —Which trousers are his?
        —The green ________ are his.
    10. Tom often comes to see me. He is a friend of ________. 
    11. September the ________ is Teachers' Day. Let's make some cards for our teachers.
    12. The text is very easy. There are ________ new words in it.
    13. —________ is wrong with my throat. I just feel thirsty.
         —Why not have ________ water?
    14. —Shall I sit at this end of the boat or the other end?
         —If you keep still, you can sit at ________ end.
    15. Our teacher asks us to read English ________ a day.
    16. We enjoyed ________ at the party last night.
    17. He has a dog. I want to have ________, too.

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    根据所给基数词，写出相应的序数词。
    1. two 　________
    2. three   ________
    3. four    ________
    4. five 　________
    5. eight   ________    		 6. nine           ________
    7. twelve 　   ________                    
    8. fifteen 　    ________
    9. twenty 　   ________
    10. thirty-one  ________

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    按要求写出单词的相应形式。
    1. three (序数词)      
    2. ninth (基数词)
    3. birthday (复数)    
    4. Jan. (完整形式)
    5. October (缩写形式)    		 ______
    ______
    ______
    ______
    ______              		6. eight (序数词)
    7. 10th (完整形式)  
    8. second (缩写形式)
    9. twenty (序数词)    
    10. thirty-first (基数词)    		 ______
    ______
    ______
    ______
    ______                                           

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    按要求写出相应的基数词或序数词。
    1. ten ______ (序数词)         
    3. twenty-five _______ (序数词)
    5. fifty-two _______ (序数词)  
    7. twenty-fifth _____ (基数词) 
    9. sixty-second _____ (基数词)      		2. nine _______(序数词)            
    4. thirty-nine _______(序数词)     
    6. seventeenth _______(基数词)                                             
    8. ninety-ninth ______ (基数词)    
    10. eighty-eighth ______ (基数词) 

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    （6分）据图回答下列问题：

    （1）据图1，若某植物幼苗已表现出向光性，且测得其向光面的生长素浓度为m，则背光面生长素浓度范围是             。
    （2）据图1可知，除草剂灭草的原理是使杂草的生长素浓度大于       （填图1中字母）。
    （3）在探究生长素促进插条生根的最适浓度时，一名技术人员用几种不同浓度生长素溶液处理插条基部，然后在沙床中培养，观察生根情况。图2为生长素促进枝条生根的情况。请结合图1判断，在下列各项浓度值中，最好选用（   ）
    A．3mg·mL-1B．6 mg·mL-1C．9 mg·mL-1D．4.5 mg·mL-1
    （4）生长素的主要作用是促进细胞纵向伸长，其作用机理如图3所示，请回答下列问题：

    ①生长素作用的第一步是与细胞膜上的受体结合，形成“激素—受体复合物”，这一过程体现了细胞膜的              功能。
    ②实验发现，细胞在持续生长过程中，细胞壁将发生一定变化，出现这种现象的原因是由于              （填细胞器）为细胞壁添加了新的成分。
    ③此外，Ca2+ 还能激活细胞中的转录因子，它进入细胞核后，能引起         酶催化mRNA的合成。

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