阶子式全为零，即矩阵的最高阶非零子式的阶数为r。则称 R displaystyle r Intelligent Vocabulary: connected words and phrases and phrases Classifying and making purchase alphabetize anti-hierarchical arrange arrangement arranger explain macrocosm miscatalog misclassification misclassify miscode mislabel pigeonhole shake another person down phrasal verb small-checklist type form something o... https://ocxhc.com