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2009年职称英语理工类C级完型填空精讲电子书
Singing Alarms Could Save the Blind
If you cannot see, you may not be able to find your way out of a burning building ---- and that could be fatal. A company in Leeds could change all that ___1__ directional sound alarms capable if guiding you to the exit.
Singing Alarms Could Save the Blind
If you cannot see, you may not be able to find your way out of a burning building ---- and that could be fatal. A company in Leeds could change all that ___1__ directional sound alarms capable if guiding you to the exit.
