英文别名DNDJEIWCTMMZBX-UHFFFAOYSA-N | DTXSID40944111 | A870807 | CHEBI:87639 | KFZNPGQYVZZSNV-UHFFFAOYSA-M | Azure B, prepared by direct synthesis | CCRIS 9314 | 7C8BEL8WQV | AKOS005287416 | N-methyl-N-(7-(methylamino)-3H-phenothiazin-3-ylidene)methanaminiumchlor ...
搜索智能精选 题目设集合A={b,c,d},则集合A的子集共有( ) A. 5个 B. 6个 C. 7个 D. 8个 答案D