B. have a good rest in the airplane

　　C. reduce the pressure of the flight

　　D. get on the airplane earlier

　　63. If a person calls “Rule 240”, he wants to__________

　　A. change for the ticket to the next flight

　　B. make sure the time for the next plane

　　C. know if other flights’ delays happen

　　D. ask the reason for the plane delay

　　64. In order not to get bumped, you must__________

　　A. wait at the loading gate of an American airport 20 minutes earlier

　　B. wait at the loading gate of a German airport 30 minutes earlier.

　　C. arrive at the entrance of a Mexican airport 10 minutes earlier.

　　D. arrive at the entrance of a British airport 30 minutes earlier.

　　65. The purpose in writing this text is to_________

　　A. show us how to get on a plane

　　B. tell us what to do before and after a flight

　　C. put forward suggestions for a flight

　　D. teach us actions before an emergency

　　D

　　When animals and plants use color to be noticed, it is called advertising coloration（着色）. Advertising coloration can be used to either warn or attract animals.

　　The bright colors of flowers and berries are advertising coloration that attracts animals. Flowers need to be pollinated（对。。。授粉）to reproduce. Bees and hummingbirds are attracted to bright colors and will pollinate the flowers. Some pollinated plants will produce berries. These berries will turn a bright color when they are ripe. The bright color lets berry-eating birds know the fruit is sweet and safe to eat. After birds eat the berries, the seeds will pass through their digestive system and be left behind. Some of the seeds left behind will grow into new plants.

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