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Explain that in the OrderPizza method, we do a lot of things, including calling the CreatePizza method to generate a desired pizza, and then doing a series of operations on the pizza. The key point is that Pizza is defined as an abstract class, which means that in the OrderPizza method we don't care what type this Pizza is at runtime, in other words, this is decoupling. The coupling between PizzaStore and Pizza is uncoupled.Free download address:Storage Tank　　该剧以与时俱进的发展变革为大背景，以一批新兵从入伍到逐渐成长为合格士兵的过程为故事脉络，以造就新型智能化士兵为蓝本，讲述了一群普通基层官兵尤其是新兵的成长史和心灵史，塑造了具有鲜明时代特色的指导员、连长、班长、战士等一组组群像。1. The borrower is required to repay the principal and interest on a monthly basis. In this way, the amount to be repaid each month is very small and the repayment pressure is also small. The lender can receive the repayment on a monthly basis with little risk. 2. Credit audit introduces socialization factors. That is, the borrower's ID card, account book, marriage certificate, academic certificate, etc. can all increase personal credit scores, but these data do not need to be provided with the original, and their authenticity is difficult to be effectively guaranteed. Therefore, the auction believes that the online community and users' online circle of friends are also one of the important parts of their credit rating system. The more friends and members' friends in the inner circle of the website, the higher the number of times individuals borrow and lend, and the higher the credit rating. In this way, the network activity and the user's personal identity, financial ability, bank credit, etc. together form a complete set of evaluation system. The unsecured and unsecured mode has only credit requirements for the borrower but no mortgage, and does not assume guarantee responsibility for the lender. The lender and the borrower trade on their own, and the auction only exists as a witness and trading platform. Therefore, in fact, this form is relatively risky for lenders. However, the winning interest rate for auction is often above 15%, which is still a great temptation for lenders. Therefore, investment in auction and loan has higher risks and higher returns. Because the transaction is concluded in the form of competitive bidding and both parties to the transaction are free to trade, the auction and loan belong to pure intermediary P2P. The auction will blacklist the borrower who fails to repay the loan within the time limit and make it public, but it will not compensate the lender for the economic losses. The auction will only refund the lender's handling fee, so the potential risks of fund recovery can only be borne by the lender itself.秦淼也道：我家去叫我爹来，旁人也说不清。哎呀，刷洗刷洗用来炖汤肯定鲜得很。