读下图，若阴影部分表示黑夜，完成下题。
在动力等条件相同的情况下，海轮从A处出发沿所在纬度做环球航行，按顺时针方向速度较快，这是因为（）
A、气压带的影响
B、风海流的影响
C、季风环流的影响
D、太阳辐射的影响
参考答案：B
解析：
顺风顺流航行速度加快，逆风逆流航行速度减慢；该图示为南半球，中高纬地区主要是海洋，A点位于南纬30°到60°之间，即位于盛行西风带，受盛行西风带影响，该地形成西风漂流，即洋流按顺时针方向，海轮从A处出发沿所在纬度按顺时针方向环球航行，即顺风顺流航行，速度较快，B项正确；气压带的气流主要是上升或下沉，对航行的速度影响不大；季风环流的形成主要是受季风影响，季风主要是丰富与亚洲的南部、东南部、东部地区，该处并未形成季风环流；太阳辐射对航行速度影响不大。
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| We often talk about ourselves as if we have permanent genetic defects (缺陷) that can never be changed. "I'm impatient.""I'm always behind." "I always put things 1 !" You've surely heard them. Maybe you've used them to describe 2 . These comments may come from stories about us that have been 3 for years-often from 4 childhood. These stories may have no 5 in fact. But they can set low expectations for us. As a child, my mother said to me,"Marshall, you have no mechanical (操作机械的) skills, and you will never have any mechanical skills for the rest of your life." How did these expectations 6 my development? I was never 7 to work on cars or be around 8 . When I was 18, I took the US Army's Mechanical Aptitude Test. My scores were in the bottom for the entire nation! Six years later, 9 , I was at California University, working on my doctor's degree. One of my professors, Dr. Bob Tannbaum, asked me to write down things I did well and things I couldn't do. On the positive side, I 10 down, "research, writing, analysis, and speaking." On the 11 side, I wrote, "I have no mechanical skills." Bob asked me how I knew I had no mechanical skills. I explained my life 12 and told him about my 13 performance on the Army test. Bob then asked," 14 is it that you can solve 15 mathematical problems, but you can't solve simple mechanical problems?" Suddenly I realized that I didn't 16 from some sort of genetic defect. I was just living out expectations that I had chosen to 17 . At that point, it wasn't just my family and friends who had been 18 my belief that I was mechanically hopeless. And it wasn't just the Army test, either. I was the one who kept telling myself,"You can't do this!" I realized that as long as I kept saying that, it was going to remain true. 19 , if we don't treat ourselves as if we have incurable genetic defects, we can do well in almost 20 we choose. | ||||
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