（）是指造成特别重大人身伤亡或者巨大经济损失，以及性质特别严重、产生重大影响的生产安

请在氧、氮、氢、钙、钠、碳这6种元素中选择适当的元素组成物质，写出符合下列要求的化学式、化学反应方程式（每空只要求写一个）：

具有温肾益精，润肠通便功用的方剂是

A．增液汤

B．黄龙汤

C．麻子仁丸

D．济川煎

E．肾气丸

I've tried to explain compound interest to my eight - year - old daughter. When I have finished it, she summarizes back to me, "So, you are saying if I put $ 100 in the bank, when I turn sixteen the bank will give me $ 200?" She has already grasped more of the concept than I understood at her age, but she couldn't clearly understand that until she sees them in action.

One day I gave her a Ziploc bag with a handful of pennies and told her over the course of a week I wanted her to give me a penny a day. I would deposit the penny in " The Bank of Dad" and compound interest would begin to accumulate the day she deposited the penny. At the end of the week we would check her bank balance.

Each day my daughter handed over one penny at the breakfast table and I deposited it in her bank. I gave her a "receipt" for her deposit and explained that she needed to keep up with the receipts to see how much money she had added to her account. In an effort to make this a little more realistic, I deposited a penny from my own piggy bank every other day to give her an additional four pennies at the end of the week.

On Sunday evening we gathered receipts and confirmed she had deposited seven pennies in "The Bank of Dad. " Then I opened the old film container and counted out its contents—all eleven pennies. "Hey, there are four extra pennies in there!" I explained that her original seven pennies had grown to eleven pennies because every couple days the bank paid her a penny for letting them use her money—that's interest. She paused and asked, "Dad, what would happen if you deposited like a hundred million pennies in the bank?

1．We can learn from Paragraph 1 that ____.

A．the writer' s daughter understood compound interest better than him

B．the writer wanted her daughter to understand compound interest

C．the writer' s daughter understood compound interest very well

D．the writer' s daughter grasped the exact meaning of compound interest

2．Which of the following is TRUE according to Paragraph 2?

A．The writer' s daughter got a handful of pennies from her father.

B．The writer got compound pennies from "The Bank of Dad".

C．The writer placed one penny in "The Bank of Dad" each day.

D．Compound interest would begin to increase at the end of the week.

3．Each day the writer’s daughter ____.

A．got a penny from her father        B．received interest from her father

C．deposited a penny in her piggy bank    D．handed over one penny to her father

4．What can we infer from the passage?

A．"The Bank of Dad" paid the girl a penny each day as interest.

B．The father used a good way to show his daughter about interest.

C．There were eleven pennies in the old film container in total.

D．The writer's daughter was very puzzled with compound interest.

5．Which of the following would be the best title for the text?

A．How to Deposit Pennies in "The Bank of Dad"．

B．Welcome to Deposit Money in the Bank.

C．How to Teach Compound Interest to Kids.

D．A Good Relationship between Father and Kid.

某类产品n种品牌在某地区的市场占有率常用概率向量u=（u₁，u₂，…，u_n）表示（各分量分别表示各品牌的市场占有率，值非负，且总和为1）。市场占有率每隔一定时间的变化常用转移矩阵P_nxn表示。如果在相当长时期内，该转移矩阵的元素均是常数，又设初始时刻的市场占有率为向量u，则下一时刻的市场占有率就是uP²，再下一时刻的市场占有率就是uP，…，而且，市场占有率会逐步稳定到某个概率向量Z，即出现ZP=Z。这种稳定的市场占有率体现了转移矩阵的特征，与初始时刻的市场占有率无关。假设占领某地区市场的冰箱品牌A与B，每月市场占有率的变化可用如下常数转移矩阵来描述：则冰箱品牌A与B在该地区最终将逐步稳定到市场占有率（）

A.（1/4，3/4）

B.（1/3，2/3）

C.（1/2，1/2）

D.（2/3，1/3）

以下关于呼吸衰竭的概念错误的是（）

A.呼吸衰竭是一组可产生一系列生理功能和代谢紊乱的临床综合征

B.是各种原因引起的肺通气功能严重障碍

C.是各种原因引起的肺换气功能严重障碍

D.是在海平面大气压下，运动条件下，呼吸室内空气，经血气分析诊断的

E.诊断时应排除心内解剖分流和原发于心排出量降低的情况