问题
不定项选择
下列事例中不是利用回声的是 [ ]
A．探测鱼群的位置
B．探测冰山离船的距离
C．将病人体内的结石震碎
D．测量海底深度
答案
答案：C
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下列事例中不是利用回声的是 [ ]
A．探测鱼群的位置
B．探测冰山离船的距离
C．将病人体内的结石震碎
D．测量海底深度
答案：C
| The early expansion of the sugar industry was based on cane transported from two different parts of the Orient, first from India and second from the islands of the Southwest Pacific. From India, sugar cane was carried through the western regions of Asia into Arabia and later into the countries bordering on the Mediterranean. It was established in Sicily in about A. D. 703 and was carried to Spain in about A. D. 755. As early as A. D. 1,150, Spain had at least 75,000 acres of cane. During this early period sugar cane was grown largely to supply local wants. The Crusades were partly responsible for the further expansion and improvement of the sugar industry and for interesting Europeans in the use of sugar. |
Cane was transported ______.
A．from the islands of the Southwest Pacific, to India, to Asia, to Arabia and then to Spain
B．from the islands of the Southwest Pacific, to the western regions of Asia, and then to the countries near the Mediterranean
C．from India to the islands of the Southwest Pacific, to Ana, into Arabia, and then to the countries bordering the Mediterranean
D．from India to Asia into Arabia, and then to the countries on the border of the Mediterranean