In fact,the smart bumblebees don’t strain(费力) themselves trying every possible route.Normally,they would only try about 20 out of the 120 possible routes to visit the flowers.
More interestingly,scientists found that if they removed a flower,bees would continue looking at that location,even if it has been empty for a long time.“It seems bees don’t easily forget a fruitful flower,” Chittka said.
28.The bumblebees are good at finding the best route because .
A.they have relatively smaller brains
B.their body parts function like GPS
C.they try out different routes and remember the best ones
D.they take the trouble of testing every possible route
解析:细节理解题。由第二段第一句“Itturnsoutthatthesehard-workinglittlebeestrymanypossiblepassagesbeforepickingoutthebestoneandrememberingitthenexttimetheyjourneyout.”可知大黄蜂是通过试错法来发现最好的路线的。而倒数第二段第一句也提到“Infact,thesmartbumblebeesdon’tstrain(费力)themselvestryingeverypossibleroute.”所以这些大黄蜂并不是把每条路线都进行尝试。
答案:C
29.The author explains the bumblebees’ behavior of trial and error by .
A.using numbers
B.making a metaphor (比喻)
C.making comparisons
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