20．What looks like an ordinary bicycle from a distance is in fact a hand-crafted green bicycle．
After months of painstaking research，designer Vijay Sharma came up with the first model for a bamboo bicycle．
Like a conventional bike，the Bambike uses metal and rubber for brakes，chains and tires．But，Sharma has replaced the steel frame for one made of bamboo，held together with hemp fiber and resin（樹脂）．
It can be strong enough to stand rough rides as the bamboo's tube-shaped structure and strength give it shock absorbing power for unsmooth roads．
Sharma says that bamboo has unique characteristics that make it the perfect material for bicycles．
"Steel does not absorb that many shocks but bamboo has the characteristic of absorbing shocks，so even on bad roads you don't require shock absorbers when using the bamboo bike．So that is one added advantage compared to a normal bicycle．"
To overcome the problem of shaking at high speeds，Sharma improved the design by using thicker bamboo，which was treated and hardened with fire and held together with hemp fiber．
How good is the Bambike？It was put to the test at the mountain biking event"Tour of the Nilgiris"in December 2009．
Ravi Ranjan，founder of"Tour of the Nilgiris"，says that the bamboo bicycle has good features and looks beautiful but some additions can improve its efficiency and functionality．
"I feel the Bambike could be improved with front and rear de-railers，gears（齒輪），a better seat post and a pedal（踏板） with cleats which makes the bike more efficient．The bike itself as it is has very good frame structure，and is lighter as compared to many of the bikes available otherwise．"
While the Bambike is still waiting to go into commercial production，some eager cyclists like Manjula Sridhar have had a chance to take it for a spin．She says the concept of Bambike is completely in tune with nature．
"The Bambike is great．Biking means nature，biking means greenery，biking means fitness，so I think，it kind of combines all those together．"
Sharma hopes that the eco-friendly nature of the design will attract cyclists to buy Bambikes．
49．It can be learned from the passage theA of the Bambike is/are made of bamboo．
A．frame B．tires C．chains D．brakes
50．Compared with the normal bicycle，the BambikeB．
A．goes at higher speed by improving the design
B．makes riding on rough roads more comfortable
C．looks more beautiful after being improved
D．uses less steel and more hemp fiber and resin
51．Which of the following best shows Manjula Sridhar's opinion on the Bambike？C
A．The mountain biking event provides a good chance to test it．
B．It not only looks beautiful but also has good characteristics．
C．Riding it can benefit both people's health and the environment．
D．It is lighter than the ordinary one，which makes it easy to carry．
52．What's the author's purpose in writing the passage？A
A．To introduce an eco-friendly bike．
B．To tell a new way of going travelling．
C．To give advice on how to improve the Bambike．
D．To compare the Bambike with the traditional one．
分析 本文主要講述了一種健康環(huán)保的騎行方式，用竹制的自行車，這既是對身體有好處也是環(huán)保的．
解答 49．A 細(xì)節(jié)理解題． 根據(jù)文章第二段內(nèi)容Sharma has replaced the steel frame for one made of bamboo，held together with hemp fiber and resin（樹脂）．可知，他用竹制的框架代替了鋼制的． 故選A．
50．B 細(xì)節(jié)理解題．根據(jù)文章內(nèi)容Steel does not absorb that many shocks but bamboo has the characteristic of absorbing shocks，so even on bad roads you don't require shock absorbers when using the bamboo bike．So that is one added advantage compared to a normal bicycle．"竹比起鋼而言能更好的起到減震的效果，因此在崎嶇的道路用bamboo bike也不需要減震器，這就是它與普通自行車的區(qū)別．故選B．
51．C 細(xì)節(jié)理解題．根據(jù)文章內(nèi)容She says the concept of Bambike is completely in tune with nature．"The Bambike is great．Biking means nature，biking means greenery，biking means fitness，so I think，it kind of combines all those together．騎行意味這自然，能量，健康．那是健康與環(huán)保的結(jié)合，故選C．
52．A 主旨大意題．根據(jù)文章內(nèi)容，本文主要講述了一種健康環(huán)保的騎行方式，用竹制的自行車，這既是對身體有好處也是環(huán)保的．因此作者寫問意在向人們介紹該種環(huán)保的騎行方式，故選A．
點評 本文是科教類閱讀理解．做這類題材閱讀理解時要求考生對文章通讀一遍，做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進行仔細(xì)分析，結(jié)合選項選出正確答案．推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據(jù)．
