向等质量、等溶质质量分数的稀盐酸和氢氧化钠溶液反应后的溶液中滴加石蕊试液,溶液呈[ ]
A.红色
B.紫色
C.蓝色
D.无色
答案:A
I was so familiar with her that I recognized her voice ______ I picked up the phone.
A.the moment
B.after
C.before
D.while
何谓坏死?坏死分为哪几种?。