题目内容
（请给出正确答案）
解答下列问题： (i)写出符合下列要求的所有化合物：①分子式为C9H14O；②分子中有两个甲基、两个羧基；③分子中含有五元碳环。 (ii)上述化合物在140～160℃加热会发生什么反应？写出它们的反应方程式。 (iii)上述化合物在300℃加热会发生什么反应？写出它们的反应方程式。
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更多“解答下列问题： （i)写出符合下列要求的所有化合物：①分子式…”相关的问题
写出符合下列要求的同分异构体，并用系统命名法命名这些化合物(用中英文)。 (i)分子式为C7H10 (ii)链形结构 (iii)分子中只能有一个双键
对下列三个线性规划问题，分别写出其对偶问题，并加以比较：
(1)max
s.t．
xj≥0(j=1，2，…，n)；
(2)max
s．t．
xj≥0(j=1,2，…n)，xsi≥0(j=1,2，…，m)；
(3)
s．t．
xj≥0(j=1,2，…，n)，xsi,xai≥0(i=1,2，…，m)，其中M表示充分大的正数．
根据题目要求完成下列任务，用中文作答。
以下是某堂课的教学材料：
Betty: Hi Mum， can you hear me？
Mum: Yes， I can. Where are you？
Betty: I‘m standing on the Great Wall of China and talking to you.
Mum: Really？
Betty: We‘re on a school trip and we‘ve having lunch. And we‘re lying in the sun and we‘retaking lots of photos.
Mum: That‘s great， Betty. What are the others doing？
Betty: Well， Tony is eating an ice cream， and Lucy is buying some presents and postcards.And Tom is eating lunch and lying in the sun.
Mum: Can you send me a post card？
Betty: Yes. Lucy and I are writing postcards. We‘re enjoying the school trip a lot. Anyway，we‘re going home now. Bye!
Mum: Bye bye， Betty!
根据材料内容回答以下三个问题。
（1）这份材料属于哪种语篇类型？（7分）
（2）这份材料适合于哪种课堂教学？说明理由（至少写出两个要点）。（8分）
（3）分析教师选用文本材料时需要考虑的基本要素（至少写出三个要点）。（15分）
A.不能即时答复的涉税疑难问题5个工作日内回复
B.通过互联网络、手机AP
C.即时通讯软件等渠道为纳税人提供涉税咨询问题
D.对国家税务总局及省局重点联系企业及其成员提供面对面咨询预约服务
E.在办税服务厅设置咨询服务专岗，负责解答涉税咨询问题
A.不能即时答复的涉税疑难问题5个工作日内回复
B.通过互联网络、手机P
C.即时通讯软件等渠道为纳税人提供涉税咨询服务
D.在办税服务厅设置咨询服务专岗，负责解答涉税咨询问题
E.对国家税务总局及省局重点联系企业及共成员提供面对面咨询预约服务
根据题目要求完成下列任务。用中文作答。
阅读所给材料，回答下列三个问题：
（1）这两份材料分别属于哪种语篇类型？（6分）
（2）这两份材料分别适合于哪种课堂教学？说明理由（至少写出两个要点）。（12分）
（3）分析教师选用文本材料时需要考虑的基本要素（至少写出三个要点）。（12分）
材料1
Tom: Hello Alice. I‘m interested in your work saving birds! What do you think is the most difficult part of your work？
Alice: Well ... I suppose it‘s saving wild birds covered in oil. That‘s the most difficult of all.
Tom: How does that happen？
Alice: The oil comes from boats. It floats on the water and covers the bird‘s feathers when they swim through it.
Tom: That sounds terrible. What do you do about it？
Alice: The first thing we do is to make sure the bird hasn‘t tried to clean itself with its beak.
As it does so， the bird eats some oil and becomes sick.
Tom: Oh dear! Do the birds always die？
Alice: Sometimes ... but we try to save them. Birds use their feathers like a raincoat to keep out cold water. When feathers are covered in oil， they stick together and a bird‘s skin gets cold in the water. So without help the bird would die of cold!
材料2
Scientists have discovered that when chimpanzees have stomach pains， typically because of intestinal parasites， they look for a certain plant to eat， Lippea. It is common in the jungles where chimpanzees live， and it contains chemical substances effective against many parasites.
Lippea is not the only natural medicine in the chimpanzees‘ cabinet. They may actually use up to thirty different plants——for different problems. Interestingly， the local people make use of many of the same plants for medical purposes. It is almost certain that chimpanzees discovered these herbal remedies before humans.
A.股东有权查阅股东会议记录
B.股东有权要求公司按照章程规定的期限向其提供财务会计报告
C.股东有权要求公司按照出资比例向其分配红利
D.股东有权要求公司返还其出资
