Coromandel Coast, broad coastal plain in eastern Tamil Nadu state, southern India. Extending over an area of about 8,800 square miles (22,800 …
常见问题解答
问:
Cornelis Drebbel’s invention, built of wood and greased leather and propelled by oars, was the first of which type of boat?
答:
Cornelis Drebbel, a Dutch inventor, is usually credited with building the first submarine. Between 1620 and 1624 he successfully maneuvered his craft at depths of 4 to 5...
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