一种焊线,直径0.25毫米,长30米,成分为铅93.5%、锡5%、银1.5%
参考答案:78060010
在单元格中输入公式时,输入的第一个符号是()。
A.=
B.+
C.-
D.$
Mrs Zhang is _____ all her time and energy _____ being a mum right now. [ ]
A. devote; on
B. devoting; on
C. devote; to
D. devoting; to