【题目】（9分）下列是利用小鼠所做的几个实验，请回答相关问题：
实验一 选择30只生理状况大致相同的健康成年小鼠，测定小鼠单位时间耗氧量的平均值，以代表小鼠的物质代谢强度，将其随机分为甲、乙两组，做如下处理：
组别 | 实验处理方法 | 实验结果 |
甲 | 切除小白鼠体内的甲状腺 | 切除10天后，测得其物质代谢强度大大下降 |
乙 | 切除小白鼠体内的甲状腺，5天后，连续给小白鼠注射一定量溶于某种溶剂中的甲状腺激素 | 切除10天后，测得其物质代谢强度没有下降 |
由此可以推测：甲状腺激素能增强__________________________。为了证明这一推论，要增加一对照实验，对照实验的处理方法是________________________________________。
实验二 已知卵巢分泌的雌性激素能促进子宫发育。研究人员为探究垂体分泌的促性腺激素对卵巢和子宫发育的影响情况，用一批幼鼠做了如下实验：
组别 | 手术/处理方法 | 相同条件下喂养一段时间后，卵巢的平均重量（mg） | 相同条件下喂养一段时间后，子宫平均重量（mg） |
1 | 不做处理 | 68 | 216 |
2 | A | 36 | 93 |
3 | 切除垂体，同时定期注射适量雌性激素 | 37 | 219 |
4 | 切除垂体，同时定期注射适量促性腺激素 | 66 | 219 |
请回答：
（1）实验所用的幼鼠性别应为____________________，且小鼠的生长发育状况和个体应大小相近，原因是________________________________________。
（2）表中A处的处理方法为________________________________________。
（3）从实验结果可以看出，促性腺激素只能影响____________________的发育，第三组实验结果产生的原因是________________________________________。
【答案】（9分，除标明外，每空1分）
实验一：小鼠的物质代谢 从切除甲状腺后的第5天开始，注射等量的用于该实验的溶剂（2分）
实验二：（1）雌性 保证单一变量
（2）切除垂体，同时注射等量溶剂
（3）卵巢
切除垂体后，促性腺激素减少，导致卵巢不能正常发育，而定期注射的雌性激素促进了子宫发育（2分）
【解析】实验一：从实验的处理方法可知，该实验的目的是探究甲状腺激素对小鼠代谢能力的影响。甲、乙两组对照说明甲状腺激素可以增强物质代谢的强度。由于甲状腺激素是溶于某种溶剂的，为了排除这种溶剂对物质代谢的影响，所以应增加一对照组，处理方法是从切除甲状腺后的第5天开始，注射等量的用于该实验的溶剂。实验二：（1）由于该实验探究的是促性腺激素对卵巢和子宫发育的影响情况，所以应选用雌性小鼠。小鼠的生长发育状况和个体大小都属于无关变量，所以要保持相近。（2）第2组实验中，小鼠的子宫和卵巢均减轻，所以该组的处理方法应是切除垂体，同时注射等量溶剂。（3）第4组实验和第3组实验相比，小鼠的卵巢重量较大而子宫重量一致，说明了促性腺激素只影响卵巢的发育。第3组实验中因为切除了垂体，所以促性腺激素减少，导致卵巢重量变轻，但注射了适量的雌性激素，所以子宫发育正常。
百年学典课时学练测系列答案
仁爱英语同步练习册系列答案科目：高中地理 来源： 题型：
【题目】七选五
根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
It is said that farmers or peasants, especially those in developing countries, are often criticized for cutting down forests. But a new study suggests that many farmers recognize the value of keeping trees.
Researchers using satellite images found at least ten percent trees cover on more than one billion hectares of farmland. 1 . Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.
The study found the most trees cover in South America. 2 . North Africa and West Asia have the least.
The study found that climate conditions alone could not explain the amount of trees cover in different areas. 3 . There are areas with few trees but also few people, and areas with many trees and many people. The findings suggest that things like land rights, markets or government policies can influence tree planting and protection.
Dennis Garrity heads the World Agroforestry Center. 4 . The problem, he says, is that policy makers and planners have been slow to recognize this and to support such efforts.
The satellite images may not show what the farmers are using the trees for, but trees provide nuts, fruit, wood and other products. 5 . Even under drought (干旱) conditions, trees can often provide food and a way to earn money until the next growing season.
Some trees act as natural fertilizers. They take nitrogen (氮气) out of the air and put it in the soil. Scientists
A. Nor could the size of nearby populations, meaning people and trees can live together.
B. He says farmers are acting on their own to protect and plant trees.
C. Almost all of it is covered by trees.
D. They also help prevent soil loss and protect water supplies.
E. He devotes most of his time to making people realize its importance.
F. That is nearly half of the farmland in the world.
G. Next comes Africa south of the Sahara, followed by Southeast Asia.
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】国学，泛指中国传统文化。近年来，借助电视、网络等现代手段，通过专家通俗化的解读在社会上兴起了“国学热”。中国传统文化强调家国至上，强调礼之用、和为贵，强调天酬勤、大无畏，强调坚毅自强，所有这些都对家庭、国家和社会起到了巨大的维系和调节作用。
材料中我国传统文化的基本思想是如何体现伟大民族精神内涵的？
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】根据汉语意思完成句子
1. 毫无疑问，他是一个诚实的人。（doubt）
_______________________________________________
2. 我正在街上散步，这时大雨倾盆而下。（pour down）
_______________________________________________
3. 我星期一是在火车站遇到老同学的。（强调句型）
_______________________________________________
4. 及时完成工作是重要的。（vital）
_______________________________________________
5. 正如经常发生的那样，他又迟到了。（as）
_______________________________________________
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】七选五
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Make home a happier place to be
Sometimes, kids don’t think their parents are fair to them. When you want to dress in a modern way, your mum doesn’t approve of what you’re wearing. When you are making phone calls to friends, they ask if you’re speaking to a boy or a girl. Sometimes, it seems that you’re not at close to your parents as you used to be. 1
Closing the Gap, by American author Jay McGraw, gives advice on how to have a better relationship with your parents. 2 When you think “my parents don’t want me to have any fun, ” that usually means your parents want you to be safe. 3 They need to feel they are important and loved. You should tell your parents your needs, and find out what their needs are. Then, you can think of a way to make all of you happy. The book gives you some ideas.
● 4 You could talk about your school life and your plans for the future.
● Keep a diary. This is t help you understand more about yourself and your feelings.
● Show your parents you are growing up. Wash your own clothes and help around the house. 5
If you follow these steps, slowly, you will be able to break down the walls between your parents and yourself.
A. Make time to talk.
B. Here are some suggestions.
C. How can you become close again?
D. Both parents and children have needs.
E. Your parents will feel thatyou are no longer a small child.
F. Show respect for your parents, relatives and all the guests.
G. He gives ways to help teens understand their parents.
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】听一段材料，回答下面几个小题。
【1】
A. Those who often sent text messages.
B. Those who suffered from heart disease.
C. Those who did no physical exercise.
D. whose who were unmarried
【2】
A. They responded more slowly than usual.
B. They sent more messages.
C. They typed 10 percent faster on average.
D. They edited more passages.
【3】
A. Why chemical therapy works.
B. Why marriage helps fight cant
C. How unmarried people survive
D. How cancer is detected after marriage.
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】—My mother is preparing my favorite dishes.Go with me and have a taste，okay?
—________.And I’ll be glad to meet your parents.
A．I think so B．I’d love to
C．I’m sure D．I hope so
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】七选五
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Culture means any human behavior that is learned in human society. All of the meaningful parts of a culture are passed on to different generations through tradition or social learning. 1 Culture exists in agricultural as well as industrialized (工业化的) societies.
Culture is necessary for the survival (幸存) of human beings. Practically everything humans know, think, value, feel, and do is learned through taking part in a cultural system. 2 Here is one of the cases of children growing up apart from human society. In the province of Midnapore in India, a scientist was told by local villagers that there were “ghost (鬼)” in the forest. Upon looking into the case, he found that two children appeared to have been living with a group of wolves in the forest. 3 In his diary, the scientist describes his first view of Kamala and Amala (the names of the children).
Kamala and Amala were terrible-looking creatures; the heads were like big balls covering the shoulders. Their eyes were bright and sharp, unlike human eyes. They were very fond of raw meat and raw milk. 4
It is important for children to live in a healthy cultural environment because they learn knowledge through imitating others. 5
A. From this viewpoint, all human groups have a culture.
B. These children were the ghosts described by the local people.
C. This statement is well supported by some well-written cases.
D. Human beings can develop abilities by fighting against nature.
E. Culture refers only to the
F. In general, their behaviors and habits were totally different from human beings.
G. They learn human languages and behaviors by taking part in a certain cultural group.
查看答案和解析>>
科目：高中地理 来源： 题型：
【题目】七选五
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
体裁 | 话题 | 词数 | 难度 | 建议时间 |
议论文 | 从奥运会中学到的 | 297 | ★★★☆☆ | 5分钟 |
Lessons That Are Learned from the Olympics
The Olympic Games are enjoyed by everyone. Here are some tips about how to bring the deeper meaning of the Olympics into your life:
◆ 1 There are hundreds of events at the Olympics, each standing for a specific activity that athletes have chosen to follow. You can recognize the creativity and excitement and form strong feelings about it, which will help you to achieve your dreams.
◆Excellence comes with hard work and practice. Learning about the training schedules of Olympic athletes reminds us that success don’t come easy. 2 Set long-term goals as well as realistic ones and try best to reach them. Work hard for your personal best, and remember the most important competitor you have is actually you.
◆Expect to fail sometimes. Every athlete who has made it into Olympic competition has suffered injury and disappointment along the way, but that has not been the end of their dream. They know that they can learn more from failure than success. 3
◆ 4 With its symbol of five-ring Olympic flag, the Olympics celebrate the unity of the games while honoring individual nationality. Athletes show respect to those from other countries.
◆Enjoy your successes. Observe the Olympic athletes when they stand on the winners’ platform with their medals, listening to their national anthems(国歌). 5 Enjoy the feelings of power that come from your achievement. You deserve it.
A. Enjoy other cultures.
B. Their pride is obvious.
C. Practice determines the fate of a player.
D. Find your strong feelings and develop it.
E. Repetition is the servant(仆人) of success.
F. They have strong confidence in themselves.
G. You can treat your setbacks(挫折) as a teaching tool.
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com