17．Snakebites affect between 1.2 million and 5 million people each year around the world．Adults，children and pets around the world experience them．They can result in swelling，bleeding or even death．Any snakebite can be dangerous if infection sets in．Some types of snakevenommake the bite area swollen or painful．Others cause bleeding or damage the heart's nerves．Here are some especially dangerous snakes：
The largest of all poisonous snakes，king cobras can reach 5.5 meters in length．Each king cobra bite contains enough poison to kill an elephant-or 20 people．But these massive snakes usually avoid people．They live throughout India，southern China and Southeast Asia．
A bite from Australia's inland taipan，the world's most poisonous snake，releases enough venom to kill 100 men．The good news is that people rarely come in contact with this snake，and a treatment for its venom exists．
Russell's viper lives throughout Asia，including India，southern China，and on the island of Taiwan．It prefers grassy fields but can be found in forests and cities．It bites more people and causes more deaths than any other poisonous snake．
Though short，the common Indian krait packs a powerful punch in its bite．Most often，it strikes people at night while they are sleeping．Since the bite causes little pain，victims are often not sure that they have been bitten until they begin to experience stomach cramps．Without treatment，symptoms will worsen quickly and can lead to death．
The black mamba，a native of Africa，is actually olive or grey in color．Only the inside of its mouth is black．When black mambas feel threatened by a human，they make a loud hissing sound to warn the person away．If the warning is ignored，the snake will attack the person repeatedly．And they can attack quickly，moving over the ground at speeds of up to 20 kilometers per hour．
If a snake bites you，try to get back so it doesn't bite again．And try to identify it if you can do so safely．Remove any jewelry that could constrict the bitten area．And avoid moving the affected limb （四肢） to slow the venom's spread．Most importantly to get antivenin，a medicine that will stop the venom's effects．Even the most dangerous bites can be cured with quick medical treatment．（403 words）
61．How many kinds of dangerous snakes are mentioned in this passage？C
A.3 B.4 C.5 D.6
62．Judging from the context，the underlined word"venom"in Paragraph 1 meansA．
A．poisonous fluid B．high speed
C．remarkable size D．dangerous behavior
63．What does the passage imply about the inland taipan？D
A．It was once believed to be extinct．
B．Very little is known about its behavior．
C．Some people keep one as a pet．
D．An encounter（遭遇）with it could be deadly．
64．According to the passage，which of the following are you most likely to see in a city？C
A．A king cobra B．An inland taipan C．A Russell's viper D．An Indian krait
65．If you are bitten by a snake，you should NOTB．
A．try to get back to avoid another bite
B．try to move the bitten limb to speed the spread of the venom
C．try to identify the snake if you can do so safely
D．try to get antivenin as soon as possible．
分析 本文屬于說明文閱讀，作者通過這篇文章主要向我們描述了眼鏡蛇、太攀蛇、羅素的毒蛇、印度金環(huán)蛇和黑曼巴蛇五種有毒的蛇的生活地點、習慣等；并介紹了被毒蛇咬后的急救措施．
解答 61．C．細節(jié)理解題．通讀全文，可知文章在2到6段分別描述了眼鏡蛇、太攀蛇、羅素的毒蛇、印度金環(huán)蛇和黑曼巴蛇五種有毒的蛇；故選C．
62．A．詞義推斷題．根據(jù)文章第一段"Some types of snakevenommake the bite area swollen or painful"某些類型的蛇毒使得咬區(qū)腫脹或疼痛等；可知詞義為蛇毒，即有毒的液體；故選A．
63．D．推理判斷題．根據(jù)文章第三段"A bite from Australia's inland taipan，the world's most poisonous snake，releases enough venom to kill 100 men"從澳大利亞的內陸太攀蛇咬一口，世界上最毒的蛇，釋放的毒液足以殺死100個人；可知這種蛇一旦遇到就是致命的；故選D．
64．C．細節(jié)理解題．根據(jù)文章第四段"．It prefers grassy fields but can be found in forests and cities"它喜歡草地卻可以在森林和城市；可知在城市里可以看到羅素蝰蛇；故選C．
65．B．細節(jié)理解題．根據(jù)文章最后一段"And avoid moving the affected limb （四肢） to slow the venom's spread"可知被毒蛇咬后不應該移動身體，這會導致毒素擴散加速毒發(fā)；故選B．
點評 考察學生的細節(jié)理解和推理判斷能力，做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．
