For some people, the sight of a mouse can be reason to scream. For other mice, the same sight can be reason to sing.

    Mice will probably   21   sing their way to any concert, but researchers in the United States have found   22   that mice do,   23  , sing.

    Scientists already knew that mice make ultrasonic(超声波) sounds—noises that are too high-pitched(高音的) for people to hear   24   special equipment.

    To find out whether mice put such sounds together in song-like   25  , the researchers recorded the sounds of 1 mice. Using computer   26  , they were able to separate the sounds into specific types of syllables(音节), and found the mice produced about 10 syllables per second.

    The results showed that nearly all of the mice repeated sequences(顺序) of syllables in different patterns. That’s enough to meet the definition of what scientists   27   song. But not all scientists are   28  _ that what the mice are doing is   29   singing. To prove it, the researchers must show that there’s learning involved. And, they need to __  30   why the mice sing.

21. A. almost                      B. even                        C. never                      D. usually

22. A. coincidence   B. evidence               C. guidance               D. instance

23. A. at once           B. by means              C. for example D. in fact

24. A. during                       B. inside                      C. through                 D. without

25. A. fashions                   B. instructions C. patterns                D. styles

26. A. access                      B. printer          C. screen          D. software

27. A. call                             B. hear                        C. sing                         D. write

28. A. accustomed  B. convinced             C. involved                 D. qualified

29. A. actually           B. obviously               C. simply           D. unlikely

30. A. figure out                B. get about              C. run across            D. talk over

 0  19034  19042  19048  19052  19058  19060  19064  19070  19072  19078  19084  19088  19090  19094  19100  19102  19108  19112  19114  19118  19120  19124  19126  19128  19129  19130  19132  19133  19134  19136  19138  19142  19144  19148  19150  19154  19160  19162  19168  19172  19174  19178  19184  19190  19192  19198  19202  19204  19210  19214  19220  19228  151629 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网