问题
选择题
由于某种原因，使森林中几乎所有的树木颜色变成了灰白色。多年以后，使得该森林中不同颜色的蛾的数量发生了变化，下列哪幅图最能表示这一变化结果 [ ]
A．
B．
C．
D．
答案
答案：D
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由于某种原因，使森林中几乎所有的树木颜色变成了灰白色。多年以后，使得该森林中不同颜色的蛾的数量发生了变化，下列哪幅图最能表示这一变化结果 [ ]
A．
B．
C．
D．
答案：D
Is it difficult for you to get up in the morning? Do you sometimes oversleep? Do you often 26 late? Yes? Then Hiroyuki Sugiyama of Japan invented a 27 bed for you. His bed will wake you up! Here is 28 it works. There is an alarm clock and a recorder（录音机） in the bed. When the clock 29 a sound, you’ll have a few minutes to wake up. Then the recorder plays light music with a little girls’ 30 voice. She says quietly, “Wake up, my dear.” A few 31 later, a second recording plays. It can be unpleasant sounds, “Wake up, 32 you’ll be late!” If you don’t get up after the 33 recording, you’ll be sorry. There is a mechanical (机械的) “ 34 ” in the bed. It can kick（踢） you in the head. Then the bed 35 for a few more minutes. What? You’re 36 lying in bed! Slowly the top of the bed goes 37 . The end of the bed goes lower and lower. 38 the bed is straight. You slide off(滑下)the bed and fall onto the 39 . You are 40 the bed and awake.
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