关于我国气温分布的叙述，正确的是：（ ）
A．冬季全国普遍寒冷，夏季全国普遍高温，南北气温相差都不大
B．冬季和夏季南北气温相差都很大
C．夏季全国普遍高温，南北气温相差不大；冬季南北气温相差很大
D．冬季全国普遍高温，南北气温相差不大；夏季南北气温相差很大
答案：C
题目分析：夏季时，由于太阳直射点在北半球，北半球是一年中的夏季，太阳高度角高，接受到的太阳光热多，气温普遍较高，我国也不例外；冬季时，太阳直射点移到了南半球，离北半球较远，是北半球一年中的冬季，太阳高度角低，接受到的太阳光热少，由于我国南北跨纬度大，南北因纬度的差异而出现气温的差异就大，此时纬度较低的，接受到的太阳光热比纬度高的更多，而且按低纬向高纬递减的趋势。因此我国的气温是夏季全国普遍高温，冬季南北温差大。
“I can’t believe what I’m hearing!” I thought to myself. Jeff was the last candidate (候选人)for president of Student Council. My best friend Tony came to me and said, “I’m sorry, Mike. I really thought you should be 1 .” Later that day, I happened to pass Jeff in the dining room. I offered him a 2 “Congratulations” and walked to my usual table. To my surprise, Jeff put his plate beside mine. “I’m, er…I’m just wondering if you would …consider coming to work on my team,” he said 3 . “You are really smart, and you would be a great manager.” “I don’t think so,” I replied, feeling unsure. “Well, if you change your mind, we are meeting tomorrow,” he said before moving to another table. All that night, I thought about the offer from Jeff. Maybe being a part of the election process(选举过程) would give me a 4 to make important changes at our school. I decided to join them. My first goal was to 5 an attractive advertisement. Within a few days, we designed a poster with Jeff’s pictures showing him in a number of activities. No one could walk through any hallway 6 passing Jeff’s smiling face. My next step was to 7 which new activities students would like to have at our school. Many of them wanted a chess club and a volleyball team. With the information I had collected, Jeff met with the headmaster. The headmaster 8 to add these activities to our school program. An eighth grader said, “It’ll be like attending a new school with Jeff as president.” Hearing these words made my heart filled with 9 . I had wanted to become president of Student Council to make a difference. I achieved that and more by working as a member of Jeff’s team. He became the most popular candidate and I was large part of his 10 . The fact that it has made a difference in other people’s lives is the real prize. What a great feeling!
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