湿作业成孔灌注桩施工中,如果混凝土坍落度太小,可能引起的质量事故是()。 A.桩孔偏 发布时间:2019-01-13 11:54 │ 来源:www.tikuol.com 题型:单项选择题 问题: 湿作业成孔灌注桩施工中,如果混凝土坍落度太小,可能引起的质量事故是()。A.桩孔偏斜B.孔壁坍落C.缩孔D.断桩
题型:单项选择题 如图所示,a、b、c是一条电场线的三点,电场线的方向由a到c,a、b间距离等于b、c间距离,用φa、φb、φc和Ea、Eb、Ec分别表示a、b、c三点的电势和场强,可以判定A.φa>φb>φcB.Ea>Eb>EcC.φa –φb=φb –φaD.Ea = Eb = Ec 查看答案
题型:单项选择题 一 The woman biologist stayed in Africa studying wildlife for 13 years before she returned to her country. — Oh, dear! She _____ a lot of difficulties.[ ]A. may go through B. might go through C. must have gone through D. ought to have gone through 查看答案