交叉路口
发表于 2025-3-21 19:49:37
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Negotiate
发表于 2025-3-22 00:09:47
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vanquish
发表于 2025-3-22 03:52:40
0072-5285 m the book has been used in this way at the University of Michigan, Indiana University, and Texas A&M University, and has proved serviceable. In addition to its primary purpose as a textbook for a formal course, however, it is the authors‘ hope that this book will also prove of value to readers inte
hypertension
发表于 2025-3-22 05:19:05
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凶残
发表于 2025-3-22 09:54:40
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parallelism
发表于 2025-3-22 12:58:27
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吼叫
发表于 2025-3-22 19:20:37
Cardinal numbers,the “cardinal number” of any set ., finite or not, to represent the number of elements in .. This goes as follows: A symbol, called the . of . (notation: card .), is associated with each set . according to the rule that card . and card . shall be equal if and only if there exists a one-to-one mapping of . onto ..
聪明
发表于 2025-3-23 01:04:47
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needle
发表于 2025-3-23 03:25:22
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dapper
发表于 2025-3-23 08:18:28
The rudiments of set theory, of . and . of a collection of sets. We write . ∈ . to mean that . is an element of a set ., . ∉ . to mean that . is not an element of ., and . ⊂ . (or . ⊃ .) to mean that . is a subset of .. We also use the standard notation ∪ and ∩ for unions and intersections, respectively.