对隧道内局部温度偏高的地段，可考虑设置水冷却装置（）。

There are times when people are so tired that they fall asleep almost anywhere. We can see there is a lot of sleeping on the bus or train on the way home from work in the evenings. A man _____1_____(fold) the newspaper, and seconds later, ______2______ appears as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger _____3______ (sit) next to him. Another place where unplanned short sleep goes on is in the lecture hall  _____4______ a student will start snoring（打鼾）so ____5______(loud) that the professor has to ask another student to keep the sleeper awake. _____6_____ more embarrassing situation occurs when a student starts falling into sleep and the weight of the head pushes the arm off the desk, and the ____7______ (move) carries the rest of the body along. The student wakes up on the floor ___8_____ no memory of getting there. The worst time to fall asleep is when driving. Police reports are full of accidents that occur when people fall into sleep and go __9____ the road. If the drivers are lucky, they are not seriously hurt. When people are really tired, _10____ will stop them from falling asleep ---- wherever they are.

设备设计承包商的选择原则不包括( )。

A．具有相应级别的资质证书和良好的社会信誉

B．有同类项目的设计经验和用户评价

C．有国际影响力的承包商优先

D．具有满足项目要求的设计质量保证能力

【说明】
请完成下列Java程序。程序的执行结果是生成一个具有一个TextField类型的对象in、 Button类型的对象btn和Label类型的对象out图形用户界面，程序的功能是计算用户输入数的平方，如图3所示。

注意：请勿改动main()主方法和其他已有的语句内容，仅在下划线处填入适当的语句。
【程序】
import java. awt.*;
import java, awt. event.*;
public class square
public static void main(String args[ ])
(1)


class AppFrame extends Frame
TheAdapterTest listener = new TheAdapterTest( );
Text Field in = new TextField (5);
Button btn = new Button("计算");
Label out = new Label("用于显示计算结果");
public AppFrame( )

setLayout( new FlowLayout( ));
add(in);
add(btn)
add(out);
btn. addActionListener( new BtnActionAdapter( ));
addWindowListener (listener);
setSize(400,100);
show( );

class BtnActionAdapter implements (2)
public void actionPerformed( (3) )
String s = in. getText( );
double d = (4)
double sq = d * d;
out. setText(d+"的平方是:" +sq);


class TheAdapterTest extends WindowAdapter

public void windowCIosing( (5) )

System. exit(1)

数字信号通信的优点有（）

A.抗干扰能力强

B.容易加密，保密性好

C.通信质量高

D.通用灵活，便于和计算机联网