A:醋酸的电离程度逐渐增大,溶液的PH值减小
B:逐渐减小
C:水的电离程度增大
D:变大
关于x的不等式(mx﹣1)(x﹣2)>0,若此不等式的解集为{x|1m<x<2},则m的取值范围是____
At the beginning of each semester, each student has great ____( 信心) in their study.