阴树脂受污染后,出现一些特征,下面叙述错误的是()
A.树脂的交换容量下降
B.树脂的颜色变深
C.再生后正洗时间延长
D.pH值上升
参考答案:D
We all feel it is Jack as well as his wife that for their son's bad performance at school.
A.are to blame
B.is to the blamed
C.are to be blamed
D.is to blame
为抢救重症毒蛇咬伤患者,抗蛇毒血清可不作皮内试验。