题目内容
苯甲酸钠必须转变成（）后才有抑菌作用，常用作防腐剂是因为它在水中溶解度（）的原因。
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Beads， stones， seashells， paper， precious metals such as gold and silver， base metals such as iron have all been used as money. Today， money is printed on paper. A lot of countries use their own currency， with n ames such as dollar， pound， franc， ruble， yuan and so on. Since 2002， 18 of the EU members have replaced their national currencies by Euro notes and coins. If you want to pay for something in another currency, you have to change your money into the other money. If you want to travel outside your native country, you need to change your own country's money for the money of the country you are visiting. Most large banks sell foreign currencies. You can exchange money at a bank or at an office of a tourist agency Wherever you go, exchanging money puts you in touch with international finance, which is concerned with exchange rates between different currencies. Deciding the rate for the international exchange of money is one of the most complex aspects of international banking. Foreign exchange rates have significant impact on the economy of a country.
银行业金融机构应在重要信息系统投产前至少（）个工作日向中国银监会或其派出机构报告。
为什么要设置跨期摊配账户？其用途结构如何？
经济是税收的基础，编制税收计划时，只有树立从经济到税收的观点，才能使计划切合实际。
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