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计算题：轨道车一短轴的尺寸为直径，试说明该轴的基本尺寸、上偏差、下偏差和最大极限尺寸。又已加工好A、B两个该零件，A的直径是50.025mm，B的直径是49.985mm，A、B是否是合格品？

答案

参考答案：

该轴的基本尺寸：d＝50mm，上偏差es＝＋0.024mm，下偏差ei＝－0.016mm

最大极限尺寸Dmax＝d＋es＝50＋0.024＝50.024mm

最小极限尺寸Dmin＝d＋ei＝50＋（－0.016）＝49.984mm

答：A零件：Φ50.025mm大于最大极限尺寸50.024mm，为不合格品。

B零件：Φ49.985mm大于最小极限尺寸49.984mm，为合格品。

问答题

下列程序中，要求输出一个特定文件(这里是ex1.java)的相关信息，包括文件的名字，相对路径以及文件的长度。请将程序补充完整。
程序运行结果如下：
name:ex1.java
path:ex1.java
length:299
注意：不改动程序结构，不得增行或删行。
import java.io.*;
public class ex1

public static void main(String[] args)

File filel=new File("ex1.java");
System.out println("name:"+file1.______);
System.out println("path:"+file1.______);
System.out println("length:"+file1.______);
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填空题

短文填空。

     All over the world people enjoy sports. Sports help people to keep healthy, happy and to live longer.

     Many people like to 1_______ (观看) others play sport games. They buy tickets or turn on their TV

set to watch the games. They often 2_______ (感到) very very happy when "their" player or team wins. 

     People play different games in winter and summer. Summer is 3_______ (有利于) swimming. And in

winter people often go skating.

      Some sports are very interesting and people everywhere are in them. 4_______ (例如), football is

very popular. In China most people, men, women, boys and girls like to watch football games. They often

5_______ (谈论) it. Some people often 6_______ (踢足球). Running and jumping began 7_______

(很久，很久以前). But basketball and volleyball are rather new. People began to play them 8_______

(不久以前). And people are starting new sports or games all the time. Water skiing is one of the

9_______ (最新的).

      People from 10_______ (不同的国家) may not be able to understand each other, but after a game

they often become friends.

1._______ 2._______ 3._______ 4._______ 5._______

6._______ 7._______ 8._______ 9._______ 10._______
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