直流电阳极插入骨折处，通以10μA的微直流电，有促进骨痂生成加速骨折愈合的作用。
参考答案：错
It was ______ who had accomplished the functional linguistics and made the London School of Linguistics one of the most competitive linguistic theories in the world.
A. Ｍ.Ａ.Ｋ.Halliday B. Bronislaw MalinowskiC. J.R.Firth D. Sigmund Freud
CJ0-20型交流接触器，采用的灭弧装置是（）。
A.半封闭绝缘栅片陶土灭弧罩
B.半封闭式金属栅片陶土灭弧罩
C.磁吹式灭弧装置
D.窄缝灭弧装置
