By the 19th century, the British economy had achieved global dominance, producing one-third of the world’s manufactured goods, half of its coal and iron.
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Britain's agricultureT is highly centralized, highly mechanized and highly efficient: 1.5% of the working population can meet about 60% of the food needs.
A. 对
B. 错
There is an English idiom” to carry coal to Newcastle”, which means to help somebody in time.
A. 对
B. 错
喷头按热敏感元件划分,可分为( )和( )两种类型。