题目　为了验证铜生锈 (钢锈的主要成分是铜绿 ,化学式为 [Ｃｕ2 (ＯＨ) 2 ＣＯ3]) ,某化学兴趣小组的成员进行了图 1的实验。一个月后 ,才发现Ｂ中铜丝慢慢生锈 ,且水面处铜丝生锈较严重 ;而Ａ、Ｃ、Ｄ中铜丝基本无变化。根据图 1铜丝生锈实验 ,回答下列问题 :图 1　铜丝生锈 Title In order to verify that copper is rusting (the main component of steel rust is agglomerate, chemical formula [Cu2 (OH) 2 CO3]), members of a chemistry interest group conducted the experiment in Figure 1. A month later, it was discovered that the copper wire in B slowly rusted, and the rust on the surface of the water was more serious; while the copper wires in A, C, and D were basically unchanged. According to Fig. 1 Copper Wire Rusty Experiment, answer the following questions: Figure 1 Rusted copper wire