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  3. Astronomers (have increases) their observation powers (greatly) through (improved) high-powered telescope, computer simulations

Astronomers (have increases) their observation powers (greatly) through (improved) high-powered telescope, computer simulations

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问题 Astronomers (have increases) their observation powers (greatly) through (improved) high-powered telescope, computer simulations and (coordinate) with other scientists.
选项 A、have increases
B、greatly
C、improved
D、coordinate
答案D
解析 coordinate应改为coordinating,因为做介词through的宾语。
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