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听力原文： Advertising expenditure worldwide was $225 billion last year, according to a report of a leading magazinE.$32 billion of this, or 14%, was taken by magazines. In Europe, the share of consumer magazine advertising expenditure was $12 billion, or 21% of an estimated overall spend of $57 billion. But the share has dropped in the past 15 years from 30 per cent, with decline having been particularly severe in Belgium and Germany where commercial television was introduced relatively latE.
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单项选择题
固体热膨胀式传感器的两个金属片的热膨胀系数相同。
A、正确
B、错误
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在15世纪末以前，从西方通往东方的商路有三条。一条是至今仍大名鼎鼎的“丝绸之路”。此路线是陆路，以        为起点，经小亚细亚、黑海和里海南岸至中亚，再翻越帕米尔高原到中国。另两条则是海路。一条从叙利亚和地中海东岸经两河流域到波斯湾，另一条则是从埃及经红海至波斯湾，再换船到印度和中国。
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