问题
选择题
下列说法中正确的是（ ）
答案
答案：D
A、在同一直线上，两个力方向关系不明，合力不一定等于两个力的大小之和，故本选项错误．
B、在同一直线上，10N和8N的两个力的方向不一定是相反的，合力不一定等于10N﹣8N=2N，故本选项错误．
∵重力的方向总是竖直向下的．∴C项错误；D项正确．故选D．
搜题请搜索小程序“爱下问搜题”
下列说法中正确的是（ ）
答案：D
A、在同一直线上，两个力方向关系不明，合力不一定等于两个力的大小之和，故本选项错误．
B、在同一直线上，10N和8N的两个力的方向不一定是相反的，合力不一定等于10N﹣8N=2N，故本选项错误．
∵重力的方向总是竖直向下的．∴C项错误；D项正确．故选D．
| Cloze test. | ||||
| Most people believe they don't have much imagination. They are 1 . Everyone has imagination, but most of us, once we become adults, forget how to 2 it. Creativity isn't always 3 with great works of art or ideas. People at work and in their free time 4 think of creative ways to solve problems. Maybe you have a goal to achieve, a tricky question to answer or you just want to expand your mind! Here are three techniques to help you. Making connections This technique involves taking 5 ideas and trying to find links between them. First, think about the problem you have to solve or the job you need to do. Then find an image, word, idea or object, for example, a candle. Write down all the idea/words 6 with candles: light, fire, matches, wax, night, silence, etc. Think of as many as you can. The next stage is to relate the 7 to the job you have to do. So imagine you want to but a friend an original 8 ; you could buy him tickets to match or take him out for the night. NO limits! Imagine that normal limitations don't 9 . You have as much time/space/money, etc. as you want. Think about your goal and the new 10 . If your goal is to learn to ski, 11 , you can now practise skiing every day of your life (because you have the time and the money). Now 12 this to reality. Maybe you can practise skiing ever day in December, or every Monday in January. Be someone else! Look at the situation from a 13 point of view. Good businessmen use this technique in trade, and so do writes. Fiction writers often imagine they are the 14 in their books. They ask question: What does this character want? Why can't she get it? What changes must she make to get what she wants? If your goal involves other people, put yourself in their 15 . The best fishermen think like fish! | ||||
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