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¡¡¡¡ÀýÒ»£ºPerhaps, some scientists thought, migrants determine their geographic position on Earth by celestial navigation, almost as human navigators use stars and planets, but this would demand of the animals a fantastic map sense. (Ñ¡×ÔN0.6ÌâµÚÒ»Ì×section 1¶ÌÎÄÕÂ)


¡¡¡¡Õâ¾ä»°¿´Ëƺܳ¤£¬·­Òë³ÉΪÖÐÎĵÄÒâ˼ÊÇ£º“ÓÐЩ¿ÆÑ§¼ÒÈÏΪ£¬¾ÍÏñÈËÀà²ÉÓúãÐǺÍÐÐÐÇÀ´¶¨Î»Ò»Ñù£¬ºòÄñ»òÐíÒ²ÊDzÉÓÃÌìÌåµÄµ¼º½²ÅµÃÒÔÈ·¶¨ËüÃÇËù´¦µÄµØÀíλÖ㬵«ÕâÒªÇóÕâÀදÎï¾ßÓÐÁîÈËÄÑÒÔÖÃÐŵĵØÍ¼¸Ð¡£”ÖÐÎĶÁ¹ýÈ¥¶¼ÈÃÈËÍ·ÌÛ¡£ÆäʵÎÒÃÇÓÃÐéÄâÓïÆøÈ¡·ÇµÄ˼ÏëÀ´´¦Àí£¬ÆäÒª±í´ïµÄÒâ˼¾ÍºÜ¼òµ¥£¬¶Ôǰ°ë¾ä»°È¡·Ç£¬Ëµ°×Á˾ÍÊÇǰ°ë¾ä»°ÊÇÐв»Í¨µÄ£¬Ò²¾ÍÊÇ“migrants cannot determine their geographic position on Earth by celestial navigation.”¿ÉÒÔÖªµÀ×÷Õß¶ÔÕâÖÖ½âÊͳָºÆÀ¼Û¡£


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¡¡¡¡Àý¶þ£ºAccording to natural selection theory, a worker would enhance her fitness—or ability to propagate her genes—by hatching her own eggs in addition to or in place of the queen’s.(Ñ¡×Ô¹úÄÚÌâ1993Äê10Ô¿¼Ìâsection 5¶ÌÎÄÕÂ)


¡¡¡¡Õâ¾ä»°Ò²ÊÇÐéÄâÓïÆø£¬ÎÒÃÇÖ±½ÓÈ¡·´Àí½â£¬×÷ÕßÏëÒª±í´ïµÄ¾ÍÊÇ “a worker will not enhance her …”


¡¡¡¡ÔËÓÃÕâÖÖÈ¡·ÇµÄ˼ÏëÎÒÃÇ¿ÉÒÔѸËٵİÑÎÕ×÷ÕßµÄ̬¶È£¬ÒÔ¼°×÷ÕßÏëÒª±í´ïµÄÕæÊµÒâ˼¡£¾Í²»ÓÃÏÈ·­Òë³ÉÈÆ¿ÚµÄÖÐÎÄ£¬ÔÙÆ´ÃüµÄ˼Ë÷ÆäÖеĺ¬Ò壬¿ÉÒÔÓÐЧµØÎª¿¼ÊÔÕùȡʱ¼ä¡£


¡¡¡¡(2) ÔÚÌâ¸ÉÖп´µ½ÐéÄâÓïÆø£¬´ó¶àÐèÒªÓõ½È¡·Ç˼Ï룬ÓëÖ®Ïà¶ÔÓ¦µÄÒ»ÖÖÌâÐÍÊÇGREÔĶÁÌâÖг£¼ûµÄÒ»ÖÖ£¬½Ð×ö“¸Ä½øÐÍÈ¡·ÇÌ┡£¿´Àý×Ó֮ǰ£¬Ïȼòµ¥½âÊÍÏÂʲôÊÇ“¸Ä½øÐÍÈ¡·ÇÌ┡£ºÜ¼òµ¥£¬Èç¹ûÌâ¸ÉÎÊ“Èç¹ûÒ»¸ö¶ÔÏóÔõÑù»á¸üºÃ”ÔòÊǸĽøÐÍÈ¡·ÇÌ⣬À´¿´¾ßÌåµÄÀý×Ó£º


¡¡¡¡Àý£ºIt can be inferred from the passage that the “first theories” of grazer control mentioned in line 3 would have been more convincing if researchers had been able to(Ñ¡×ÔNO.6µÚ¶þÌ×section 1³¤ÎÄÕÂ),ÕâÊÇÒ»¸öµäÐ͵ĸĽøÐÍÈ¡·ÇÌâÌâ¸É£¬ÎʵÄÊǵÚÈýÐеÚÒ»¸öÀíÂÛÔõÑù»á¸üºÃ¡£


¡¡¡¡Âß¼­Ë¼Â·£º¼ÈÈ»ÊǸĽø£¬Ô­ÎĿ϶¨Ëµµ½ÁËËüµÄ²»ºÃÖ®´¦»òÕßÓÐunlessµÄ¾ä×Ó£¬ÎÒÃǰÑÔì³É²»ºÃµÄÔ­ÒòÈ¡·Ç£¬¾ÍÊÇËùÒªµÄ´ð°¸ÁË¡£


¡¡¡¡°´ÕÕ´Ë˼·¶¨Î»Ô­ÎÄÈýÐУ¬¿´µ½ºóÃæÓÐÕâÑùÒ»¾ä»°“A low number of algal cells in the presence of a high number of grazers suggested, but did not prove, that the grazers had removed most of the algae.”×¢Òâ¿´²åÈëÓﲿ·ÖµÄ“but did not prove”£¬Õâ¸ö¾ÍÊÇȱµã£¬È¡·Ç¾ÍÊÇ“prove”ÔÙ¿´Îå¸öÑ¡Ï


¡¡¡¡(A) observe high phytoplankton numbers under natural lake conditions


¡¡¡¡(B) discover negative correlations between algae and zooplankton numbers from their field research


¡¡¡¡(C) understand the central importance of environmental factors in controlling the growth rates of phytoplankton


¡¡¡¡(D) make verifiable correlations of cause and effect between zooplankton and phytoplankton numbers


¡¡¡¡(E) invent laboratory techniques that would have allowed them to bypass their field research concerning grazer control


¡¡¡¡Ò»ÑÛɨ¹ýÈ¥¾ÍÖ»ÓÐÒ»¸öÑ¡ÏîÔÚ½²Ö¤Ã÷£¬¾ÍÊÇDÖеÄverifiable¡£ËùÒÔ´ð°¸Ñ¡D¡£ºÜ¿ì½âÍê´ËÌâ¡£


¡¡¡¡(3) È¡·ÇµÄ˼·³ýÁË¿ÉÒÔÔÚÐéÄâÓïÆøÖÐʹÓ㬻¹¿ÉÒÔÔÚÁíÒ»ÖÖÂß¼­¹ØÏµÖÐʹÓ㬾ÍÊÇÇ¿¶Ô±ÈµÄ¹ØÏµ£¬Ò²¾ÍÊÇGREÔĶÁÌâÖÐÁíÒ»ÖÖ³£¿¼ÌâÐ͓ǿ¶Ô±È»¥È¡·ÇÌ┣¬ÆäÖ÷ÒªÌØµãÊÇ£ºÔ­ÎÄÖÐÓÐÇ¿¶Ô±ÈµÄË«·½£¬Ìâ¸ÉÖ»Îʼ°ÆäÖÐÒ»·½£¬´ð°¸ÊǶÔÁíÒ»·½ÐðÊöµÄÈ¡·Ç;»òÕßÌâ¸ÉºÍÔ­ÎÄ´æÔÚÇ¿¶Ô±ÈÒªËØ£¬ÈçµäÐ͵Äʱ¼äÒªËØ£¬´ð°¸Ò²ÊǶÔÔ­ÎĵÄÐðÊöÈ¡·Ç¡£


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¡¡¡¡Àý£ºThe author suggests that, before the early 1950’s, most historians who studied preindustrial Europe did which of the following?(Ñ¡×ÔNO.6µÚÈýÌ×section 4 ³¤ÎÄÕÂ)


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