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一、实验原理：
萘乙酸与生长素一样，对植物生长的调节作用具有___________________________性，即
_______________________________________________________________。（2分）
二、实验过程与方法：
（1）取材；取山茶花植株生长良好的半木质枝条，剪成5—7cm，每段插条芽数相同。
（2）实验：①将插条分别用不同的方法处理如图1；②将处理过的插条下端浸在清水中，注意保持温度（25～30℃）。
（3）记录：小组分工，根据实验数据，建立数学模型如图2。
三、结果分析与评价：
（1）从图2中，可得出的结论是_________________________________________ 。
（2）插条若没有生出不定根，其原因最可能是____________________________ 。
（3）温度、处理时间等要一致，其原因是_________________________________ 。
（4）每组都选取10根插条，其目的是____________________________________ 。 查看习题详情和答案>>
①乡村五月的晨，醒得特别早。仿佛还没来得及揉揉眼，天色便温柔地明亮起来。
②想起临睡前母亲说今天该采茶了，赶紧翻身起床。清水洗漱后，素面朝天地向屋后茶园信步而去。
③沿着春草丰满的小径向前，向前。晨露盈盈在我穿行游走的身后滴答作响，行不远，就看见母亲拎一小桶埋头在茶树丛中一朵一朵地采摘青茶。天地间罗下薄薄的清雾，空气中漫布着青草、泥土特有的味道，茶树们井然有序地排列着，伸出一只只浅嫩的小手，一定是想抓住这个春天轻灵的羽翼吧!
④母亲含笑嗔怪我昨日在旅途风尘仆仆一天，累了，没多睡会，眼神却分明欣喜地巴望一起采茶，多点时间亲近她的女儿。学着母亲的样子，我一边小心翼翼地采摘着鸟舌般俏皮柔嫩的新芽，一边听她细声轻语絮叨着如烟的往事。
⑤一场场春雨飘过，茶树喝饱了水，滋滋地直望外冒着青翠的嫩芽，从清明到立夏前都是采茶的季节。那时候，青山茶场的千里茶园里便人声鼎沸，热闹非凡了，远远放眼望去，碧绿葱翠的茶山上星罗棋布地遍撒着一个个俏生生的采茶姑娘。她们如翩翩彩蝶穿梭在一条条绿色长龙间，头带草帽，腰挎竹笼，双手起舞，上下翻飞，一片片，一叶叶，采摘着满垅的希翼和梦想，茶树兴奋地颤抖着发出淅淅沥沥的欢唱。少女时的母亲便是那群茶姑里的一个。以前采茶都是一水的黄花闺女，母亲说，茶是最好“色”的，一个季节下来，那些丰满水灵的女孩子一个个都变得面黄肌瘦，神色憔悴。我一旁听了吃吃地笑，哪里是茶好色呀，分明是采茶的活太艰辛乏味，茶姑们的消瘦大致是劳累所致吧。
⑥布谷鸟高声吟唱着不急不慢地巡回在原野，和煦的清风痒痒地拂面而过。说着这些青葱往事时，母亲像往常一样抿嘴笑了。细细看看母亲，她真的老了，那昔日光洁明媚的额角不经意间爬上几道深深的沟壑;清澈的眸子有了些许浑浊;逐渐发福的身体不再灵动妙曼，连采茶也要戴着老花镜才能看清。我暗暗叹口气，心里湿湿沉沉的。不知还能喝多久母亲亲手采摘的茶叶了。
⑦吃过晚饭，父亲笑吟吟地问我要不要看茶叶是怎么炒制“出笼”的，他毫不吝啬地夸起母亲的聪明能干，去年只看过一次就学会了自己做茶。灶膛里的豆萁随着划起火柴的青烟熊熊燃起，红彤彤的火舌忽忽地舔着锅底，母亲把我们采了一天的青茶叶一股脑儿倒进锅里，赤裸着双手不慌不忙地翻炒起来。一股浓郁的清香蓦地扑鼻而来，飘飘缈缈地弥漫开去，一时间连满屋的空气都沉醉在沁人心扉的茶香余韵中。
⑧杀青、摊青、烘焙，母亲双手不停舞动，翻、揉、捻、搓丝毫都不含糊，那一点头一舒臂的灵活机警好象换了个人似的。我托腮依在灶边，贪婪地吸着，嗅着，陶醉着，铁锅散发的热气合着茶叶袅袅的清香逐渐逐渐盈润着我的心……
⑨二个多小时后，茶叶终于烘干焙好，粉墨登场了，簸箕里的新茶条索紧致，纤毫毕现，一共7两有余。望着母亲红肿麻木的手掌，拭着她额头沁出的汗珠，我感动莫名，没成想，每天在手中的青瓷茶碗里舒缓轻舞，婀娜多姿，清香碧纤的茶叶，竟然来得这么艰辛不易。那杯中朵朵盛开的叶片，可是朵朵都凝结着母亲浓浓的爱呀!
【小题1】这篇文章主要描述了两个场面，请你各用一个词语概括出来。(2分)
【小题2】赏析第⑤段画线句中“穿梭”“起舞”“翻飞”这些词的表达效果。 (2分)
【小题3】请结合文意对“母亲”这一人物形象作分析。（3分）
【小题4】第⑨段画线句在文中有何作用？（3分） 查看习题详情和答案>>
一、录音中有五个句子，每个句子听一遍，然后从每小题后的A、B、C中选出能对每个句子作出适当反应的答语。
1．
[ ]
|
A．A good idea. |
B．Enjoy yourself. |
C．I think so. |
2．
[ ]
A．Take care.
B．Have a good time.
C．Good luck.
3．
[ ]
A．You are too young.
B．Better wait until spring.
C．You need more exercise.
4．
[ ]
|
A．My pleasure. |
B．That's all right. |
C．Sure. |
5．
[ ]
|
A．She is a teacher. |
B．She is my sister. |
C．She is English. |
二、录音中有五组对话，听两遍对话后，从每小题后的A、B、C中选出能回答所给问题的正确答案。
6．How much time is left for the woman?
[ ]
|
A．Twenty minutes. |
B．Ten minutes. |
C．Thirty minutes |
7．How will the man go to Beijing?
[ ]
|
A．By plane. |
B．By train. |
C．By car. |
8．Who is the man speaking to?
[ ]
A．His daughter.
B．His daughter's teacher.
C．His teacher.
9．What is Mary going to do after supper?
[ ]
A．See a film.
B．Go to a meeting.
C．Prepare for her speech.
10．Which of the following pictures is right about Jane?
三、录音中有一段对话，听两遍对话后，从每小题后的A、B、C中选出能回答所给问题的正确答案。
11．How long has the man had the radio?
[ ]
A．Two days.
B．Two weeks.
C．Two months.
12．Why does the man come to the shop?
[ ]
A．He wants to buy a radio.
B．He wants to get a different radio.
C．There is something wrong with his radio.
13．Why can't the man wait long?
[ ]
A．He needs the money very much.
B．The factory is too far away.
C．He is using it to learn English.
14．What does the man hope to do?
[ ]
A．Change his radio for another one.
B．Send it back to the factory.
C．Get it repaired.
15．What may be the result?
[ ]
A．The man gets back his money.
B．The man gets a new radio.
C．The man gets his radio repaired.
四、录音中有一篇短文，听两遍短文后，从每小题后的A、B、C中选出能回答所给问题的正确答案。
16．Who is the speaker?
[ ]
A．Mr. James.
B．A student.
C．A geography teacher.
17．What are the students going to do tomorrow?
[ ]
A．Have a picnic.
B．Have a writing class.
C．Have a field trip.
18．What will the students have to do tonight?
[ ]
A．Look at the rocks.
B．Study the piece of paper.
C．Write a report.
19．What will the students try to look at in the field?
[ ]
|
A．Rocks. |
B．Plants. |
C．Animals. |
20．What should the students do to make it a rewarding(值得的) experience?
[ ]
A．Take care of plants and animals.
B．Put their hearts into it.
C．Put some money in the bank.
查看习题详情和答案>>用方块中的词语补全Jean对她的一天生活的描述.
I left home at 8 am yesterday morning and I went to college (1) ________. I arrived there (2) ________. My lessons began at (3) ________ and finished at (4) ________. I went to (5) ________ for lunch. I met (6) ________ there and we had lunch together. We both ate (7) ________. After lunch I bought (8) ________ for my mother, and my sister went to (9) ________ to play volleyball. In the evening I stayed at home and (10) ________.
查看习题详情和答案>>根据首字母完成短文
This term
（学期） Mr.Smith t __(1)___ us English. He i __(2)___ a tall man. He likes w __(3)___ a white shirt （衬衣） and black trousers（裤子）. He can speak very good English. We all like h __(4)___ very much.He is a new teacher, a __(5)___ he d __(6)___ know our names. He has all the names o __(7)___ a small piece of paper
（一张纸）. On the f __(8)___ lesson, he says, “Let me c __(9)___ your names. Mike.”“I'm h __(10)__.”(1)________ (2)________ (3)________ (4)________ (5)________
(6)________ (7)________ (8)________ (9)________ (10)________
查看习题详情和答案>>