图中A，B，C，D处于同一纬度，四地中昼夜温差最小的是（）
A、A处
B、B处
C、C处
D、D处
参考答案：C
解析：
海洋热容量大，昼夜温差小，B，C的昼夜温差较A，D小，A，D错。阴天时白天云对太阳辐射削弱作用强，白天气温较晴天低，晚上云又可增加大气逆辐射，对地面起保温作用，气温较晴天高，因此阴天较晴天气温日较差小，C昼夜温差较B小，C正确。故答案选C。
点评：此题主要考查的是大气运动的知识，在做此题时要注意紧紧结合所学知识，认真进行分析。
Travelling is a very good activity. When you get tired of your work or study, and when you are not busy, you can go to a beautiful place to enjoy the beauty of nature or other cities. You can take in fresh air, meet different people and make friends with them. It is good for your health to do so. But sometimes, travelling is not an enjoyable thing. For example, the weather can be changeable too often. You may catch a cold or be ill while travelling. The worst thing is some bad persons may steal your money. All these may happen to a tourist. When you go on a trip, you must get everything ready. Firstly, you must have clear information about the weather. Secondly, ask a friend to go with you so that you can help each other. Thirdly, you must be careful everywhere and try not to cause accidents. If you do this, you will surely enjoy our travel.
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