网址：http://m.1010jiajiao.com/timu_id_2333139[举报]
阅读理解
① HOUSE TO RENT Older house to rent in city centre. One bedroom and one kitchen. Near important station. Buses pass back door. $ 475/mo. Phone 332－0178
② WELCOME TO OUR DANCE CLUB Free lessons. Every Saturday evening a different lesson every week. Bring your favourite CDs. Call Bridget at: 520－1928
③ SWIMMING LESSONS FOR STUDENTS Newquay Training Centre
July 8－10
④ WORK WANTED Strong boy pleased to work in garden or do housework. 3 hours a week.
See Tom.
根据前面广告的内容及以下各题中所给提示，选择正确答案。
Look at ad ① Susan is looking for a house to rent(出租). It doesn't matter how old and how expensive it is. She's got to study for her exams, so the house must be quiet.
1．Susan doesn't want to rent(租用) the house because ________.
[ ]
A．it's too old
B．it's too expensive
C．there is only one bedroom
D．it's too noisy
Look at ad ②
Mum：Look at that ad for the dance club! The lessons are free(免费的). You can join it!
Daughter：My dear mum! You haven't read it carefully. On Saturday, I have an English lesson in the morning, an art lesson in the afternoon and a maths lesson in the evening. I want some free time.
2．Why can't the daughter join the club?
[ ]
A．She has no CDs.
B．She has an art lesson.
C．She has an English lesson.
D．She has a maths lesson.
Look at ad ③ Mr. Klip's children are going to learn swimming. They'll have a holiday from July 1 to July 14.
3．How long will it take the children to learn to swim in the Centre?
[ ]
Look at ad ④ Nick has always wanted to work in a garden. He thinks it's an exciting place. It's hard work, but he can do it.
4．What does he need to do if he chooses to do the garden work?
[ ]
A．To help Tom with his lessons.
B．To clean the kitchen and the rooms.
C．To look after the flowers and grass.
D．To do the washing for 3 hours a week.
查看习题详情和答案>>基础写作
请根据以下的情景说明和写作要求，使用5个规范的英语句子描述全部所给的信息内容．
[写作内容]
陈林是某市第一中学高三年级一班的学生．他在该校学习已近五年．他们学校前面有条大河．过去河水清洁．但前年河对面建了一个化工厂，这个工厂把污水排到河里，致使河水发黑、发臭．该厂噪声也很大．这种情况严重地影响了学生的学习、休息和健康．因此，在夏天来临之际；请你以陈林的名义写信给市长．要求市长采取措施，更好地关心学生的健康．
[写作要求]
1．必须使用5个句子介绍全部所给的内容(不包括已经给出的句子)；
2．短文必须包含所有内容；不得在信中使用自己的真实姓名和地址；
3．可适当增加细节或感受，使其连贯完整．
［评分标准］
概括的准确性、语言的规范性、内容的合适性以及篇章的连贯性．
Dear Mr．Mayor,
I am a senior student in a middle school．I am writing to ask you for help．________
Thank you．
Yours,
Wang Li
实验一：将空白琼脂和含EDTA的琼脂做成帽状，分别套在甲、乙两组玉米胚根的根冠外（示意图如下）。提示：EDTA的作用是去除与其临接部位的 Ca2+。
将胚根水平放置培养一定时间后，观察到甲组胚根向重力（下）生长，乙组胚根水平生长。根据上述实验结果，得出实验结论： 。
实验二：水平放置的胚根弯曲向下生长，与根冠近地侧的Ca2+浓度明显高于远地侧有关。研究表明，根总是朝着Ca 2+浓度高的方向弯曲生长。为验证这一结论，有人设计了下列实验方案。请根据提供的实验材料和用具，写出第二步及以后的实验步骤和实验结果，并回答问题。
（1）实验材料和用具：胚根等长的萌发玉米种子，空白琼脂帽，含EDTA的琼脂帽，上面部分含Ca2+的琼脂帽（水平方向），培养皿等。
（2）实验步骤：
第一步：取若干个培养皿，在每个培养皿中放置适量的萌发玉米种子，按实验一中乙组的方法处理胚根一定时间后，移去根冠外的琼脂帽。然后将培养皿平均分成两组，编号为 A组、B 组。
第二步： 。
第三步： 。
（3）实验结果： 。
（4）科学家进一步证实，根冠中生长素的分布受Ca2+浓度影响，当胚根水平放置时，重力诱导Ca2+向根冠下侧移动，导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系： 。 查看习题详情和答案>>
