题目内容

交割是指合约到期时，按规则和程序，交易双方通过合约所载标的物所有权的转移，或按规定结算价格进行现金差价结算，了结到期期末平仓合约的过程。()

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Mandarin, or Putonghua, is the standard service sector language in our country. But recently, employees at a big city's subway station have been busy learning dialects of other parts of the country. Proponents say that using dialects in the subway is a way to provide better service. But opponents think that encouraging the use of dialects in public counters the national policy to promote Putonghua. What is your opinion？ Write an essay of about 400 words on the following topic:
Are Dialects Just as Acceptable in Public Places？
In the first part of your essay you should state clearly your main argument, and in the second part you should support your argument with appropriate details. In the last part you should bring what you have written to a natural conclusion or make a summary.
Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks.