单项选择题 下列对他人之物的使用,构成侵权的是()
单项选择题 运输成本曲线从原点开始,成本曲线是随距离增长而减少的一个函数。
单项选择题 Of the following suffixes,which one can follow the root "-titan-", meaning a light strong grey corrosion-resistant metallic element used in strong lightweight alloys as for airplane parts? A. '-ic' B. '-us' C. '-ium' D. '-ous'