洞内测量导线边长在曲线地段不宜短于( )m。A.30 B.50 C.70 D.90 发布时间:2017-06-20 10:23 │ 来源:www.tikuol.com 题型:单项选择题 问题: 洞内测量导线边长在曲线地段不宜短于( )m。A.30B.50C.70D.90
题型:单项选择题 —Driving after drinking alcohol should be punished, I think.—Sure, it is several months________ the ban came to effect in the whole country. A.before B.until C.sinceD.after 查看答案