为什么在每年只生产少量产品的公司中，MRP不能很好地运行

阅读理解。

     When I was a child, I often dreamed of the time when I could leave home and escape to the city. We lived

on a farm. In the winter especially, we wear quite out off from the outside world. As soon as I left school, I

packed my bags and moved to the capital. However, I soon discovered that my life has its too.

     One big disadvantage is money. It costs so much to go out, not to mention basics like food and housing.

Another disadvantage is pollution. I suffer from asthma (哮喘), and the air is so that I am afraid to go outside.

Then there is the problem of traveling round. Although I have a car, I seldom use it became of the traffic jams.

One choice is to go by bicycle, but that can be quite dangerous.

     Of course there are advantages. First, there is so much to do in the city, whatever you tastes in culture or

entertainment (娱乐活动). Besides, there are wonderful jobs and greater chances of moving to a more important

job or position. Finally, if you like shopping, the variety of goods is very surprising-and, what is more, shops

are often only a short walk away.

     Is life better then, in the city? Perhaps it is, when you are in your teens (十几岁) or twenties. However, as

you get older, and especially if you have small children, the peace of the countryside may seem preferable. I

certainly hope to move back there soon.

1. What was the writer always thinking about when he was a child?

A. Staying on the farm.

B. Moving to the countryside.

C. Leaving home for the city.

D. Running away from the school.

2. Which of the following is true about the writer?

A. He is very old now.

B. He is in good health.

C. He prefers driving a car.

D. He lives in the city now.

3. In the passage, the writer tries to _____.

A. express his opinions about way of life

B. describe his life in the countryside

C. an interest in the outside world

D. persuade the reader to live in the city

4. How is the passage mainly developed?

A. By inferring.

B. By comparing.

C. By listing examples.

D. By giving explanations.

某同学在自学“人类文明的开端”这一单元内容时，自制了学习卡片，其中有错误的一项是[ ]

A．目前世界上的人类分为三大主要人种，这只是人体体貌特征的差异，并无优劣之分。

B．金字塔坐落在印度河流域，它是国王权力的象征。

C．在两河流域孕育的古代人类文明是古巴比伦文明。

D．在人类早期文明中，明显具有海洋文明特质的是古希腊文明。

肢体瘫痪对侧凝视，提示（）

A.皮质额中回后部8区病变

B.脑干病变

C.核间性眼肌麻痹

D.核下性眼肌麻痹

E.核上性眼肌麻痹

下列给定程序中，函数fun()的功能是求出数组中最小数和次最小数，并把最小数和a[0]中的数对调，次最小数和a[1]中的数对调。
请改正程序中的错误，使它能得到正确结果。
注意：不要改动main函数，不得增行或删行，也不得更改程序的结构。
[试题源程序]
#include＜stdio.h＞
#include＜conio.h＞
#define N 20
void fun(int * a，intn)

int i，m，t，k；
/**********************found***********************/
for(i=0；i＜n；i++)

m=i；
for(k=i；k＜n；k++)
if(a[k]＜a[m])
/**********************found***********************/
k=m；
t=a[i]；
a[i]=a[m]；
a[m]=t；