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PHP中哪个函数能判断一个文件是否可写?

【参考答案】

is_writeable

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阅读理解。 Foreign visitors are often puzzled in Japan because most streets there don't havenames. In Japan, people use landmarks instead of street names. For example, the Japanese will say to travelers,' Go straight down to the corner. Turn left at the big hotel and go past a fruit market. The post office is just across the bus stop. ' In the Midwest of America, usually there are not many landmarks. There are no mountains. So the land is very flat. In many places there are no towns or buildings within miles. Instead of landmarks, people will tell you directions and distancE.In Kansas (堪萨斯州) , for example, people will say, 'Go north two miles. Turn east, and then go another milE.' People in Los Angeles, California, have no idea of distance on the map. They measure (测量) distance by telling timE.'How far away is the post office?' you ask. '60h,' they answer, 'it's about five minutes from here, 'You say, 'Yes, but how many miles away is it?' They don't know. People in Greece sometimes do not even try to give directions because few visitors understand the Greek languagE.Instead of giving you the direction, a Greek will often say, 'Follow mE.'Then he'll lead you through the streets of the city to the post officE.Sometimes a person doesn't know the answer to your question. A New Yorker might say, 'Sorry, I have no ideA.' But in Yucatan, Mexico (墨西哥), no one answers 'I don't know. ' People in Yucatan think 'I don't know' is not politE.They usually give an answer, often a wrong onE.A visitor can get very, very lost in Yucatan! One thing will help you everywherE.You might not understand a person's words, but maybe you can understand his body languagE.He or she will usually turn and then point in the correct direction. Go on in that direction and you may find the post office! 1. What does the word 'landmarks' mean?A.Street names.B.Building names. C.Hotels,markets and bus stops. D.Buildings or places which are easily seen.2. 根据短文内容和句意，填入一个适当的单词。 People in _____ prefer to tell you directions and distance if you ask for the way.3. 把下面的句子译成汉语。 People in Greece (希腊)sometimes do not even try to give directions because few visitors understand the Greek languagE. _____________________________________________________________________________4. 通过短文内容回答问题。 Why don't people in Yucatan say,'I don't know' to a person who asks for the way? _____________________________________________________________________________5. 通过短文内容回答问题。 What does the passage mainly tell us? _____________________________________________________________________________

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完形填空。 People are often killed when they __1___ the roaD.Most of these people are old people and children. Old people are often killed because they can not see __2___ hear very well. Children are often killed because they are not __3___. They forget to look and listen before they cross the roaD. A car, truck or bus cannot stop very ___4__. If the car-is going very fast, it will travel __5___ meters before it stops. People don't always understand this. They think a car can stop __6___ a few meters. The faster a car __7___, the longer it takes to ___8__. It is very difficult for a person to know how fast a car is traveling. The ___9__safe way to cross the road is to look in both directions, right and left. Then ___10__ the road is clear, it is safe to cross. The right way to cross the road ___11__to walk quickly. It is not__12___ to run across the roaD.If people run across the road, they may fall __13___.( ) 1．A.over ( ) 2．A.and ( ) 3．A.care ( ) 4．A.shortly ( ) 5．A.much ( ) 6．A.during( ) 7．A.traveling( ) 8．A.fly ( ) 9．A.few ( ) 10．A.if ( ) 11．A.is ( ) 12．A.hard( ) 13．A.downB.across B.but B.careful B.early B.more B.among B.is travelingB.go B.only B.before B.has B.danger B.to C.crossC.bothC.strongC.quicklyC.manyC.betweenC.travelC.stopC.oftenC.whichC.areC.safeC.upD.throughD.or D.healthyD.slowly D.a lot D.in D.is to travel D.move D.always D.what D.have D.dangerous D.under

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