2007年9月8日至9日在澳大利亚悉尼举行的亚太经合组织第十五次领导人非正式会议的主题是( )。
A. 促进信息技术合作，缩小数码鸿沟
B. 促进合作，应对气候变化
C. 加强大家庭建设，共创可持续未来
D. 加强合作，建设和谐世界
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How did Maggie get to the Peak
A. By Peak Tram.
By cable.
C. On foot.
D. Not mentioned.
People want to see higher-level sports competitions mainly because ______.
A. they become more professional than ever
B. they regard sports as consumer goods
C. there exist few world-class championships
D. sports events are exciting and stimulating
可吸入性粉尘的直径小于( )
A. 10μm
B. 15μm
C. 2μm
D. 0.4μm
E. 1μm
广播电视拥有四种资源，其中被视为广播电视社会和经济效益最终源泉的是
A. 频率资源
B. 时间资源
C. 受众资源
D. 节目资源
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