题目内容
(1)编写程序“汇率情况.prg”，完成下列操作：根据“外汇汇率”表中的数据产生rate表中的数据。要求将所有“外汇汇率”表中的数据插入rate表中并且顺序不变，由于“外汇汇率”中的“币种1”和“币种2”存放的是“外币名称”，而rate表中的“币种1代码”和“币种2代码”应该存放“外币代码”，所以插入时要做相应的改动，“外币名称”与“外币代码”的对应关系存储在“外汇代码”表中。 注意：程序必须执行一次，保证rate表中有正确的结果。 (2)使用查询设计器建立一个查询文件qx. qpr。查询要求：外汇帐户中有多少“日元”和“欧元”。查询结果包括了“外币名称”、“钞汇标志”、“金额”，结果按“外币名称”升序排序，在“外币名称”相同的情况下按“金额”降序排序，并将查询结果存储于表wb. dbf中。
查看答案
搜索结果不匹配？点我反馈
更多问题
在其他因素不变的条件下，标的物价格的波动率越大，期权权利金越小。( )
盐酸利多卡因鉴别反应是
盐酸吗啡原料药的含量测定
A house is the most expensive thing most people will ever buy. Very few people have enough money of their own to buy a home, so they have to borrow money from a bank. Borrowing money from a bank to buy a house is called "take a mortgage (抵押)." The bank usually lends money or gives a mortgae for twenty-five years. Houses are so expensive that many people nowadays have to borrow as much as $ 50,000. In other words, they will have a $ 50,000 mortgage. How can you get a mortgage When you find a house you like, you go to a bank. The bank will research your financial (金融的) history and decide if they think you are a good risk. They will want to know what kind of job you have, what kind of salary you make, and how long you have had the job. They will also want to know how much money you have. In addition, the banks will require a down payment. Depending on which state you live in, the bank may require as much as 30% of the price of the house as a down payment. The bank will then lend you the rest of the money to buy the house. Many people are never able to buy a house because they cannot save enough money for the down payment. If American people borrow money from the bank for 25 years, this means that the person who borrows______.
微信支付 
支付宝支付