【题目】中国国土面积辽阔，南北跨度、东西跨度都非常大。中国自然地理环境差异显著，据此完成下列各题。
【1】寒假期间，家住海口的畅畅一家去“冰城”哈尔滨观看冰雕艺术节。到达哈尔滨时，他们的衣服由凉爽的夏装换成了厚厚的羽绒服。畅畅一家的服饰变化反映了我国（ ）
A. 南北气温差异大 B. 南北降水差异大 C. 东西跨经度广 D. 天气变化剧烈
【2】珠江三角洲和东北平原都位于我国东部，但地理环境存在显著差异，主要原因是（ ）
A. 季风强弱不同 B. 湿润程度不同 C. 热量的南北差异 D. 海拔高低悬殊
【3】北纬30°线是一条神奇的纬线，这里既有青藏高原的连绵雪峰，也有长江中下游平原的鱼塘稻田。造成这种差异的主要原因是（ ）
A. 东西经度差异 B. 纬度差异 C. 海陆位置差异 D. 地形差异
【4】我国山区面积广大，下列关于如何实现山区社会、经济和生态可持续发展的叙述，错误的是（ ）
A. 山区风景秀丽，开发生态旅游 B. 砍伐与抚育更新相结合，大力发展林业
C. 山区水能丰富，积极建设小水电站 D. 大力发展木材加工业，以满足市场需要
【答案】
【1】 A
【2】 C
【3】 D
【4】 D
【解析】
我国国土面积广大，面积居世界第三位，南北跨纬度广、气候差异很大，东西部之间跨经度大，地形及气候差异大。
【1】由题目可知，寒假期间，家住海口的畅畅一家去“冰城”哈尔滨观看冰雕艺术节，到达哈尔滨时，他们的衣服由凉爽的夏装换成了厚厚的羽绒服，畅畅一家的服饰变化反映了我国南北气温差异大，故选A。
【2】珠江三角洲和东北平原都位于我国东部，但地理环境存在显著差异，主要原因是珠江三角洲纬度低，东北平原纬度高，两地南北热量差异大，故选C。
【3】北纬30°线是一条神奇的纬线，这里既有青藏高原的连绵雪峰，也有长江中下游平原的鱼塘稻田，造成这种差异的主要原因是地形的影响，故选D。
【4】我国山区面积广大，下列关于如何实现山区社会、经济和生态可持续发展的叙述，大力发展木材加工业，以满足市场需要是错误的，其他三项做法符合可持续发展，故选D。
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And yes，it's good to get along with your teacher because，in general，it's smart to learn how to understand the different types of people you'll meet throughout your life．
"But really，there's one super﹣important reason why you should get along with your teacher．When you do，learning bursts right open，"says Evelyn Vko，a longtime teacher who writes an education column called"Teacher Says"for the Washington Post newspaper．
In fact，kids who get along with their teachers not only learn more，but they're more comfortable asking questions and getting extra help．This makes it easier to understand new material and do your best on tests．When you have this kind of relationship with a teacher，he or she can be someone to turn to with problems，such as problems with learning or school life，such as bullying．
As a kid in a primary or middle school，you're at a wonderful stage in your life．You're like a sponge （海绵），able to absorb lots of new and exciting information．On top of that，you're able to think about all this information in new ways．Your teacher knows that，in most cases，is very excited to be the person who's giving you all that material and helping you make it．Remember，teachers are people，too，and they feel great if you're open to what they're teaching you．That's why they wanted to be teachers in the first place﹣to teach!
Some kids may be able to learn in any situation，whether they like the teacher or not．But most kids are sensitive to the way they get along with the teacher，and if things aren't going well，they won't learn as well and won't enjoy being in class．
【1】In the passage，the author mainly talks about ．
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