Cau 245: Chon phuong trinh hoa hoc viet dung (chuong 7/bai 34/chung/muc 2) A2Cr^(3+)+Zn→2Cr^(2+)+Zn^(2+) B. 2Cr+6H^+→2Cr^(3+)+3H_2 C. Ag+Cu^(2+)→Cu+Ag^+ D. 2CrO_2^(2-)+3Br_2+8OH^-→2CrO_4^(2-)+6Br^-+4H_2O Dáp án: A ...
百度试题 结果1 题目Cau 45:Mot vat dao dong dieu hoa co phuong trinh x =5cos 2.r(cm).Toc do cua vat co gia tri cuc dai la? C A.5 cm's B. 10 m's C.10 cm's D. 5 m s 相关知识点: 试题来源: 解析 C 反馈 收藏
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