电弧静特性
参考答案:
在电极材料、气体介质和弧长一定的情况下,电弧稳定燃烧时,焊接电流与电弧电压变化的关系,一般称伏——安特性
—Do you like magic? They're studying _______ Liu Qian's tricks work.
—I can't wait _______ his shows! [ ]
A. what; seeing
B. how; to see
C. what; to see
D. how; seeing
外耳道恶性耵聍腺肿瘤约占耵聍腺肿瘤的百分率是()。
A.90%
B.80%
C.70%
D.60%
E.50%