单项选择题

Who founded Microsoft

A．Gates and his high school friend Paul Allen.
B．Bill Gates.
C．Gates, Allen and some other students.
D．Paul Allen.
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单项选择题
What is the attitude of the narrator towards the measure taken to noise control
A．Satisfied.
B．Indifferent.
C．Concerned.
D．Optimistic.
单项选择题
Which of the following does not belong to the usual requirements of the Federal Aviation Administration
A．New aircraft should meet specified noise standards.
B．Reducing the noise pollution by muting flights over water or unpopulated areas on takeoff and landing.
C．Constructing sound barriers.
D．Asking people to move away from near the airport.
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