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受益的非排他性

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In small-angle stability,when external forces exist,the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the().

A. center of gravity
B. center of flotation
C. metacenter
D. metacentric height

“世界主义”(cosmopolitanism)

无为思维是一种消极被动的思维吗?

我国收养法规定:收养()、()或者社会福利机构抚养的查找不到生父母的,可以不受收养人无子女和收养一名的限制。

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