题型:问答题 She has always ______ her father . In her eyes he is perfect. [ ]A. looked up B. looked up to C. looked down on D. looked on as 查看答案
题型:问答题 下列说法中正确的是 [ ]A.硫化橡胶遇汽油能发生溶胀 B.聚硫橡胶具有良好的耐严寒、耐高温性能 C.合成橡胶是以石油、天然气为原料,以二烯烃和烯烃为单体聚合而成的高分子 D.橡胶的老化实质上发生的是酯化反应 查看答案