In finance, a futures contract is a standardized contract, traded on a futures exchange, to buy or sell a certain underlying instrument at a certain date in the future, at a specified price. The future date is called the delivery date or final settlement date. The pre-set price is called the futures price. The price of the underlying asset on the delivery date is called the settlement price.

Friday, May 16, 2008

STANDARD

在各项建筑标准里,学校都必须达到最高要求。换句话说,如果普通住宅要能承受500年一遇的地震,那么学校就必须能承受1800年一遇的地震。而且,学校建筑往往是低层建筑,即使发生大地震要避免严重损失其实也并不困难。

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