电气设备按防止间接接触电击条件分为五类,具有双重绝缘的电气设备属Ⅱ类设备。下列绝缘类型中,与双重绝缘具有相同绝缘水平的是( )
【单选题】
压路机碾压不到的土基部分采用( )夯实,防止漏夯,要求夯击面积重叠1/4~1/3。
A.
小型夯压机
B.
中型夯压机
C.
大型夯压机
D.
振动夯压机
参考答案
参考解析
【单选题】
某施工合同约定预付款100万元,从开工后第5个月开始分5个月在每月初等额扣回,在承包人正常施工且提交预付款担保的情况下,开工后第6个月末的预付款担保金额应是( )万元。
20
40
60
100
【单选题】
Which of the following about teaching assessment is inappropriate?
Diagpostic assessment is a kind of test carried out after a teaching activity.
Formative assessment should be student-oriented.
Summative assessment is often carried out at the end of a term.
Portfolios,daily reports,and delivering speeches are all formative assessment.