摘要： 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.
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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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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.
| 根据所给基数词，写出相应的序数词。 | ||
|
按要求写出单词的相应形式。
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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) |
（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（ ）
（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。 查看习题详情和答案>>
（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-1 | B．6 mg·mL-1 | C．9 mg·mL-1 | D．4.5 mg·mL-1 |
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。 查看习题详情和答案>>