直流电疗时电极下放置厚衬垫的首要目的是 ( )
A. 防止电解产物对组织的损伤
B. 电极可与皮肤紧贴
C. 防止电极污染皮肤
D. 降低皮肤电阻
E. 提高导电性
I wish that it is true.
A. 对
B. 错
This is not my book. If it is mine I will lend it to you.
A. 对
B. 错
If my watch were notslow yesterday, I would not have been late.
A. 对
B. 错