问题
填空题
等比数列1，2，4…的前10项的和为______．
答案
根据题意，可得等比数列的首项为1，公比为
=2，2 1
则S10=
=210-1=1023；1(1-210) 1-2
故答案为1023．
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等比数列1，2，4…的前10项的和为______．
根据题意，可得等比数列的首项为1，公比为
=2，2 1
则S10=
=210-1=1023；1(1-210) 1-2
故答案为1023．
Society is a web of relationships, requiring all parties(群体) to work together to create something good. What makes society work best are effective(有效的) relationships that are based on mutual(相互的) understanding. If you understand what people want and why they want it, you can usually find a way to make progress together. High-quality relationships make people happy. Some people living in the poorest communities have almost nothing but turn out to be the happiest because they share a life, together. If effective relationships are working, happiness is always possible. Here are some simple tips for building effective relationships. Listen to and try to understand others' positions and feelings. Listening in itself can lead to understanding, and if you understand someone else fully, then you know how to work better with him or her. Openly express your needs and feeling. Sometimes we expect people particularly those close to us at home or work to understand what we want and to give us what we need intuitively (凭直 觉地). However, people are so complicated and so different that even when they have lived together for 60 years, they can still surprise each other. So we need to say what we need and to express how we feel. In order to make our relationships more effective, we should treat ourselves and other people with respect. Respect is one of the most important elements of any good relationship. Finally, learn to face differences correctly. Learning this takes time and can be uncomfortable. However, if we can try to remove differences in an effective way, we are more likely to build exciting and satisfying relationships with others. By doing these things you may discover that the happiness you long for is much closer than you thought. Title: 小题1:
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