All the 6,000 medals for the 2008 Olympic Games have arrived in the capital from the Shanhai Mint,ready for their debut on August 8.For the,first time in Olympic history,the medals for the Beijing Games mix metal and jade. The technology of inlaying jade into metal can date back to the Han Dynasty almost 2,000 years ago.It is not easy to bond jade perfectly with metal.The key to the process lies in the inner layer of the metal and the groove of the jade ring.A seal ring is put between the inner layer and the groove to join the metal and jade together. Jade rings used for casting Olympic medals have been subjected to strict quality controls,and those not up to the standard have been thrown away. To make use of those jade rings that do meet the quality criteria,metal medals were produced to fit the jade tings,and more than ten different sizes of seal rings were designed. To avoiding any loosening of the jade rings due to aging of the seals,glue has been used in casting the;Olympic medals,which is a painstaking manual process. Experts from the International Olympic Committee(IOC)were concerned about the risk of fragility when the jade ring design was proposed.The IOC required that jade rings should be strong enough to withstand a 2-meter drop test.The Shanghai Mint raised that standard to 3- meters.Medals call survive a 3-meter drop test with only minor cracks on the jade rings. What the International Olympic Committee(IOC)were concerned about is that  _  . A) the medals will be worth less B) the medals are too difficult to make C) competitors don't like the design D) jade is fragile and easy to break up
D

The public commonly associates steroid use with big-time athletics. But the drugs may be even more of a menace to teenagers. The synthetic hormones can stunt a young person's growth by prematurely closing the ends of the long bones in the skeleton. That means a 1.7 metre, 15-year-old high school student who uses steroids "might get bigger but won't get any taller", according to a US doctor. Nearly seven percent of boys in the US try steroids before the end of high school, according to a 1988 study by professors Charles Yesalis and William Buckley, of Penn State University. The estimate comes from a poll of 3,400 seniors in 46 public and private schools across the US. "Abusers of Steroids did it to improve their appearance and to excel at sports," Professor Yesalis said. "Parents, teachers and coaches make boys believe that to be an ideal male you need to have these. Then they say: 'you can't play games to have fun; you play games to win.'" "Such attitudes put many high school athletes at high risk of becoming abusers of steroids," said Mike Gimbel, director of Baltimore County Office of substance Abuse. "For these athletes, the pressure to perform is incredible," he said. "It was inevitable that it would seep down to high school level." Which of the following is a good title for this passage? A) Drugs and Sports B) The Pressure to School Boys are Too Much C) School Boys are Interested in Drugs D) School Athletes Risk Damage from Drugs
D

Japanese people,who never miss a chance to be photographed,were lining up to get their pictures on a postage stamp.Vanity stamps with personal photographs went on sale for the first time in Japan as part of an international postage stamp exhibition.The customer's photo was taken with a digital camera and then printed on stamp sheets,a process that takes about five minutes.Sold in a sheet of 10 stamps for $8.80,little more than the cost of lunch in Tokyo,each stamp printed a different scene from a traditional painting along with the photo. The stamps can be used normally to mail a letter,and postal officials hope they will help encourage interest in letter writing in the Internet age."Certainly e-mail is a useful method of communication,but letters are fun in a different way,"said Hatsumi Shimizu an official in the Post Ministry."We want to show young people that letters can be fun too."[ While similar stamp sheets appeared in Australia in 1999 and are now sold in some nations and territories,Japan's fondness for commemorative photos is likely to make them especially popular here.Indeed,officials had prepared 1 000 sheets but they were sold out in less than 30 minutes.Although the stamps are currently only available as a special service during the exhibition,postal officials said they may start selling them on a regular basis in the future. The purpose of this activity is  _  . A) to make the international postage stamp exhibition more interesting B) to make more stamps for normal use C) to draw interest in writing letters D) to satisfy Japan's fondness of commemorative photos

C