del 测验

名(数学) 微分运算子, 倒三角型, (计算机) 删除键简(等同于delete, delegate, delegation或delineavit) 维Nabla算子

问题 1 :

___ Valle has the blessing of a garage, so he doesn't have to claim “dibs” on shoveled street spots himself, he said.

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问题 2 :

The object of the expedition was to complete the survey of Patagonia and Tierra ___ Fuego, commenced under Captain King in 1826 to 1830--to survey the shores of Chile, Peru, and of some islands in the Pacific--and to carry a chain of chronometrical measurements round the World.

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