企业购置用于环境保护、节能节水、安全生产等专用设备的投资额的10％从企业当年的应纳税额中抵免，当年不足抵免的，不可以在以后纳税年度结转抵免。 ()
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Why did the people in Perth turn on their lights？
A. Because it was time for them to wake up.
Because they wanted to greet John Glenn.
C. Because they wanted to see Friendship 7.
D. Because they wanted to build the tracking station.
The best title of the story is ______
A. Flights of Friendship 7
B. Tracking Station
C. Radio Network
D. John Glenn
It can be inferred from the story that ______
A. all tracking stations arc inside Perth, Australia
B. Friendship 7 stopped in the United States
C. radio equipment is important in space flights
D. John Glenn worked alone in the tracking station
During his flights, John H. Glenn, Jr. , could always reach a ______
A. tracking station
B. ship at sea
C. Mercury capsule
D. city of Perth
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