Every generation has its emblematic boy’s toy. Once upon a time there was the golf cart: a little toy car specifically designed for middle-aged men too rich to care about looking ridiculous. Later came the beach buggy, a briefly fashionable, wildly impractical, single-terrain vehicle. One might include the motorcycle or the snowmobile on this list, were they not, in certain contexts, quite useful, but there is no doubt which pointless recreational vehicle has captured the imagination of the landed, middle-aged celebrity: it’s the quad bike. What is it about this squat, ungainly, easy-to-flip machine that celebrities love so much As recreational vehicles go, the quad bike is hardly sophisticated. They are to the countryside what the jet-ski is to Lake Windermere. "There’s nothing cool about a quad", says Simon Tiffin, editor of a well-known magazine. "It’s a strange thing to want to hare round beautiful bits of the country in a petrol-guzzling machine." But celebrities love quad bikes. Musicians, comedians, DJs, actors and sportsmen have all been photographed aboard quads. "They’re the latest rich person’s toy", says Tiffin. "Spoilt children get them for Christmas." Provided you~ ye got a large estate to go with it, however, the quad bike can remain a secret indulgence. You can go out and tear up your own piece of countryside without anyone knowing you’re doing it. The quad bike’s nonsensical name—"quad" means four, but "bike" is an abbreviation of "bicycle", which means two—that comes to six—hints at its odd history. Originally the ATV, or all-terrain vehicle, as quads are sometimes known, was developed in Japan as a three-wheeled farm vehicle, an inexpensive mini-tractor that could go just about anywhere. In the 1980s the more stable four-wheeled quad was officially introduced—enthusiasts had been converting their trikes for some time—again primarily for farming, but its recreational appeal soon became apparent. At the same time a market for racing models was developing. Paul Anderson, a former British quad racing champion, says the quad’s recreational appeal lies in its potential to deliver a safe thrill. It’s a mix between a motorbike and driving a car; when you turn a corner, you’ve got to lean into the corner, and then if the ground’s greasy, the rear end slides out, he says. "Plus they’re much easier to ride than a two-wheeled motorcycle." The quad bike, in short, provides middle-aged excitement for men who think a Harley might be a bit dangerous. Anderson is keen to point out that quad bikes are, in his experience, much safer than motorcycles. "With quad racing it’s very rare that we see anybody having an accident and getting injured," he says. "In the right hands, personally, I think a quad bike is a very safe recreational vehicle", he adds. Outside of racing, quad bikes are growing in popularity and injuries have trebled in the last five years. Although retailers offer would-be purchasers basic safety instructions and recommend that riders wear gloves, helmets, goggles, boots and elbow pads, there is no licence required to drive a quad bike and few ways to encourage people to ride them wisely. Employers are required to provide training to workers who use quad bikes, but there is nothing to stop other buyers hurting themselves. For the rest of the world, quad bikes are here to stay. They feature heavily in the programmes of holiday activity centres, they have all but replaced the tractor as the all-purpose agricultural workhorse and now police constables ride them while patrolling the Merseyside coastline. It has more or less usurped the beach buggy, the dirt bike and the snowmobile, anywhere they can go the quad bike can. They even race them on ice. You can’t drive round Lake Windermere on one, or at least nobody’s tried it yet. Just wait. Which of the following statements is NOT true about quad bikes
A. They can be ridden even on ice.
B. They can be used a great deal on farms.
C. They are driven by the police.
D. They are replaced by horses.
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下面的程序是从命令行输入3个数传递到public static void main(String args[])方法中(如java Is Triangle 34 5),并判断这3个数能否构成三角形的3条边,并显示相应的结果。请在程序的每条横线处填写一个位运算符,使程序的功能完整。 注意:请勿改动main()主方法和其他已有的语句内容,仅在横线处填入适当的语句。 源程序文件代码清单如下: public class IsTriangle { public static void main(String args[ ]) { int a[ ]=new ______[args.length]; for(int i=0;i<args.length;i++) { a[i]= ______; } if(______) System.out.println(a[0]+ ","+a[1]+ ", "+a[2]"能构成三角形的3条边"). else System.out.println(a[0]+ ","+a[1]+ ", "+a [2] "不能构成三角形的3条边"); } }
请完成下列Java程序;实现JComboBox,包含3个选项,分别是java、c++、vb,以及1个文本区,用于显示选择结果。 注意:请勿改动main()主方法和其他已有语句内容,仅在下划线处填入适当的语句。 源程序文件代码清单如下: import java.awt.event.*; import javax.swing.*; import java.awt.*; public class ex14_2 extends JFrame implements ItemListener { BorderLayout bLay = new BorderLayout(); JTextField jtf = new JTextField(27); JComboBox jcb = new JComboBox(); public ex14_2() { super ("ex14_2");//调用当前类ex14_2的父类JFrame的构造方法。 jcb.addItemListener(this); jcb.addItem("java"); jcb.addItem("c++"); jcb.addItem("vb"); jcb.setEditable(false); jtf.setHorizontalAlignment(SwingConstants.CENTER); jtf.setEditable(false); JPanel jp = new JPanel(); jp.setLayout(bLay); jp.add(jtf, "South"); jp.add(jcb, "Center"); setContentPane(jp); } public static void main(String[] args) { JFrame frame = new ex14_2(); frame.pack(); frame.setVisible(true); } public void itemStateChahged(ItemEvent ie) { Object o = if (o == job) { Object newO; ______; jtf.setText(newO.toString()+"被选中!"); } repaint(); } }
A: Spot DictationDirections: In this part of the test, you will hear a passage and read the same passage with blanks in it. Fill in each of the blanks with the word or words you have heard on the tape. Write your answer in the corresponding space in your ANSWER BOOKLET. Remember you will hear the passage ONLY ONCE. What is distance learning It means that you study on your own, at home or wherever suits you. Recently, the world famous Open University in the United Kingdom has designed a new style of distance learning, which is called" (1) ". The phrase "Open Learning" means you study (2) . You read course material, work on course activities, and write (3) .The word "Supported" means you have help (4) , the student services staff at regional centres, and centralised areas such as (5) . You can also contact other students through tutorials and (6) , the University’s online conferencing system and events and dubs organised by (7) . Most distance learning courses use printed paper materials. They also include some (8) materials such as a CD, DVD or video. Many courses have a website and an (9) . You’ll need access to a computer (10) to make use of these. The Open University can help its students buy a computer and (11) the cost of accessing the Internet. With most distance learning courses, no (12) are required to study. Of course, you have to be aged 18 when your course starts but there is no (13) .Currently the Open University has around (14) undergraduate and more than 30,000 postgraduate students, of which 10,000 have (15) . Nearly all students are studying (16) . About 70 percent of undergraduate students are in (17) . More than 50,000 students (18) by their employers for their studies. Most distance learning courses (19) . Some of them are even available in other parts of the world. With over 25,000 of its students living outside the UK, the Open University is the (20) that offers distance learning throughout the world.
Americans do not go in for envy. The gap between rich and poor is bigger than in any other advanced country, but most people are unconcerned. Whereas Europeans fret about the way the economic pie is divided, Americans want to join the rich, not soak them. Eight out often, more than anywhere else, believe that though you may start poor, if you work hard, you can make pots of money. It is a central part of the American Dream. The political consensus, therefore, has sought to pursue economic growth rather than the redistribution of income, in keeping with John Kennedy’s adage that "a rising tide lifts all boats." The tide has been rising fast recently. Thanks to a jump in productivity growth after 1995, America’s economy has outpaced other rich countries’ for a decade. Its workers now produce over 30% more each hour they work than ten years ago. In the late 1990s everybody shared in this boom. Though incomes were rising fastest at the top, all workers’ wages far outpaced inflation.