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问题 判断题

双链式刮板链采用长链，应按规定长度出厂选择配对，以减少两条链受力不均，在使用中也不得拆对。

答案

参考答案：对

阅读理解
阅读理解。
                          Things You Can Do to Help the Environment
CARS
     Cars are getting bigger. Bigger cars burn more gas and increase problems with air pollution.
So try to walk, ride, or take buses or subways. And if you drive a car, keep it in a good state.
This can save gas and make less pollution.
Energy
     The biggest use of home energy is for heating and cooling. So turn up your air conditioned
and ,um down the heat, especially at night. Use energy-saving lights. And remember to turn
lights off.
PRODUCTS
     Each American throws away 10 kilograms of litter everyday. Try to make less waste. Ask
yourself before you buy something: Do I need it? Buy products that you can use over and over
again.
WATER
     Showers use a lot of water. In one week, a common American family uses as much water
as a person drinks in three years! Take shorter showers or buy a special small showerhead.
This can cut water use in half.
1. Linda always takes long showers in the morning.
__________________________________________________
2. Jeff leaves the lights on at home all the time.
__________________________________________________
3. Nick buys a newspaper every day, but never reads it.
__________________________________________________
4. Gina drives to work, but her office is near her home.
__________________________________________________
5. This passage is most probably taken from _______________
A. a magazine
B. a news report
C. a diary
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问答题

基本操作题下列程序中，要求输出一个特定文件（这里是ex2_1.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: ex2_1.javapath: ex2_1.javalength: 299import java.io.*;public class ex2_1 { public static void main(String[] args) { File file2_1 = new File("ex2_1.java"); System.out.println("name: " + file2_1. ); System.out.println("path: " + file2_1. ); System.out.println("length: " + file2_1. ); }}
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