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Discounts at various bicycle shops. Why Cycle with a Group? Getting to work by bicycle has never been more popular. Governments and nations are transforming their cities and highways to meet the needs of this new generation of cycling enthusiasts, and in a world where green choices are the new must-have, average citizens are eagerly seizing their chance to help make their bodies cleaner than ever before. Become an EBTC Member. Year round, organized by members like you! The Edmonton Bicycle and Touring Club(EBTC)is a recreational not-for-profit volunteer-run group devoted to promoting it人类免疫缺陷病毒（HIV）入侵入体后，其攻击的对象主要是人体的（ ）A.T细胞B.成熟红细胞C.吞噬细胞D.B细胞