题目

电子产品触摸屏的主要材料是氧化铟（ In2 O3 ）氧化铟中铟元素的化合价是 A． +1 B． +2 C． +3 D． +4 答案：C【详解】People often _____ me with my twin sister as we are so alike. A. confuse                 B. compare                C. connect                          D. combine