增加熔滴温度会产生()
A、增加金属的表面张力系数
B、减小金属表面张力系数
C、增加熔滴尺寸
D、减小熔滴尺寸
参考答案:B, C
I started as ________ office clerk, and turned ________ department manager three years later.
A.the; the
B.an; a
C.an; /
D.the; /
进口硅酮结构密封胶使用前应提供哪些质量证明文件和报告