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2£®At first glance£¬why anyone would want to save California condors £¨ÍºðÕ£© is not entirely clear£®Unlike the closely related Andean condors with their white neck feathers£¬California condors are not much to see£®Their dull black color£¬featherless head and neck and oversized feet are hardly signs of beauty or strength£®Their appeal begins to become evident when they take flight£®California condors can fly almost effortlessly for hours£¬often covering hundreds of miles a day------far more than other creatures of the air£®When it was discovered that the condor population was becoming dangerously small£¬scientists and zookeepers sought to increase Condor numbers quickly to preserve as much of the species'genetic £¨»ùÒòµÄ£© diversity as possible£®From studying wild condors£¬they already knew that if a pair lost an egg£¬the birds would often produce another£®So the first and sometimes second eggs laid by each female were removed£¬and artificially hatched£®Such techniques quickly proved effective£®
Despite these successes£¬the effort to save California condors continues to have problems£®Artificially hatched condors released £¨ÊÍ·Å£© to the wild have died at what to some people are alarmingly high rates£®Others have had to be brought back again after they acted foolishly£®
Some of the odd behavior on the part of these re-released birds is hard to explain£®At times they landed on people's houses£¬walked across roads and airport runways£¬walked into park visitor centers and fast food restaurants£¬and took food offered by picnickers and fishermen£®None are known to have died by doing so£¬though£®Most recently£¬some of the first chicks hatched in the wild died after their parents fed them bottle caps£¬pieces of plastic and other man-made objects£®
Mike Wallace£¬a wildlife specialist at the San Diego Zoo£¬has suggested that some of the condors'problems represent natural behavior that helps them survive£®The real key to successful condor reintroduction lies in properly socializing young condors as members of a group that follow and learn from older£¬preferably adult birds£®That£¬he argues£¬was missing from earlier condor releases to the wild£®
28£®What is the California condor's most impressive feature£¿B
A£®Its beautiful colors£®
B£®Its remarkable flying ability£®
C£®The large size of its neck and feet£®
D£®The similarity it has to the Andean condor£®
29£®In the initial stage of the conservation programme£¬A£¬
A£®eggs were taken from the nests of wild condors
B£®female condors were caught and studied carefully
C£®scientists and zookeepers tried to create genetic diversity
D£®condors were encouraged to produce a lot more eggs
30£®What did some of the condors released into the wild do£¿!B
A£®They adapted surprisingly quickly to their new surroundings£®£º£º
B£®They showed a tendency to seek out human contact£®
C£®They died from eating too much fast food£®
D£®They kept changing their eating habits£®
31£®According to Mike Wallace£¬there will be fewer problems ifD£®
A£®young condors are trained not to eat man-made objects
B£®the chicks are surrounded by older birds when they hatch
C£®the chicks are released into the wild as soon as they hatch
D£®young condors are taught appropriate behavior by adult birds£®
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½â´ð 28£®B£®Ï¸½ÚÀí½âÌ⣮¸ù¾ÝµÚÒ»¶ÎµÄTheir appeal beginstobecomeevidentwhentheytakeflight£®California condors can fly almost£®effortlessly for hours£¬often covering hundreds of miles a day-far more than other creatures of the air ¿ÉÖª£¬ËäÈ» ¼ÓÖÝͺðÕÍâ±í²»ÏÔÑÛ£¬µ«ÊÇÈ´ÊÇ·ÉÐиßÊÖ£®¹ÊÑ¡B£®
29£®A£®ÍÆÀíÅжÏÌ⣮¸ù¾ÝµÚ¶þ¶ÎµÄSo the first and sometimes second eggs laid by each female were removed£¬and artificiay hatched ¿ÉÖª£¬ÎªÔö¼Ó¼ÓÖÝͺðÕµÄÊýÁ¿£¬¿Æѧ¼ÒÔÚÁ˽âÁËÒ°ÉúͺðÕµÄÏ° ÐԺ󣬰ÑöÂͺðÕϵÄÍ·¼¸¸öµ°ÄûØÀ´½øÐÐÈ˹¤ ·õ»¯£®¹ÊÑ¡A£®
30£®B£®ÍÆÀíÅжÏÌ⣮¸ù¾ÝµÚËĶεÄtheylandedon people*s houses£¬walked across roads and airport runways£¬walked into park visitor centers and fast food restaurants£¬and took food offered by picnickers and fishermen¿ÉÖª£¬ÕâЩÈ˹¤õr»¯ºó ±»·Å¹éÒ°ÍâµÄͺðÕºÃÏñ¶ÔÈËûÓÐη¾å¸Ð£¬ËüÃÇ Ï²»¶ºÍÈ˽Ӵ¥£®¹ÊÑ¡B£®
31£®D£®Ï¸½ÚÀí½âÌ⣮¸ù¾Ý×îºóÒ»¶ÎµÄThe real key to successful condor reintroduction lies in properly socializing young condors as members of a group that follow and l£¿£¿m from older£¬preferably adult birds ¿ÉÖª£¬Mike Wallace ÈÏΪÈË ¹¤·õ»¯µÄͺðÕÏëÔÚÒ°Íâ³É¹¦Éú´æµÄ»°£¬±ØÐëÈà ËüÃÇÌáÇ°ÈÚÈ뼯ÌåÉú»î£¬ÒÔ±ã¸ú³ÉÄêͺðºÑ§Ï° Éú´æµÄ±¾Á죮¹ÊÑ¡D£®
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