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We are supposed __ (follow) the teachers9 instructions,

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环境；境遇
n.

Task 5
Directions: The following is part of an introduction to life insurance. After reading it, you should give brief answers to the 5 questions (No.56 to No.60) that follow. The answers (in no more than 3 words) should be written after the corresponding numbers on the Answer Sheet.
When you buy life insurance，you want a policy that fits your needs at reasonable cost. Your first step is to determine how much life insurance you need. Next，you need to decide how much money you can afford to pay. Finally，you must policy that meets your coverage(保险类别) goals and fits into your financial plan. Once you have completed these steps，you will be able to move ahead and contact several life insurance companies through an agent who will show the fight type of policy for you.
There are many reasons for purchasing life insurance，among which are the following：
Insurance to provide family protection and financial security to surviving family members upon the death of the insured person.
Insurance to cover a particular need upon the insured’s death such as paying off a mortgage or other debts.
56. What should you take into consideration when choosing a life insurance policy？
Both your needs and the ______________________.

设某循环队列的容量为50，头指针front=5(指向队头元素的前-位置)，尾指针rear=29(指向队尾元素)，则该循环队列中共有—________个元素。

下面是通过建立计算阶乘的自定义函数计算组合C(M，N)一M!/(N!*(M—N))!)的值，其中的M，N通过键盘输入。请在（）处填上正确的语句。