阴极直流电有促进骨折愈合作用,其电流强度宜选择()
A.5μA以下
B.10μA~20μA
C.5μA~10μA
D.20μA~25μA
E.25μA~30μA
参考答案:B
They come from _______. They speak _______.[ ]
A. France; English
B. Canada; Japanese
C. Japan; Japanese
D. the United Kingdom; French
决定熟料中硅酸盐矿物含量的是()。
A、LSF
B、KH
C、SM
D、IM