【单选题】在其他条件同等情况下,要检查车辆的车况,优先选择
【单选题】For a causal relationship to exist there must be evidence
A.
of an empirical correlation between the variables.
B.
that one variable precedes the other in time.
C.
that a third variable did not cause the changes observed in the first two variables.
D.
that one variable precedes the other in time and that the two variables are correlated.
E.
that one variable precedes the other in time, that the two variables are correlated and that this relationship is not spurious.
【单选题】在TCP/IP协议族中,( )协议负责分组数据的传输。
【单选题】在TCP/IP协议族中,( )协议负责分组数据的传输。
【单选题】在TCP/IP协议族中,()协议负责分组数据的传输
【简答题】教学实施效果的评价的维度包括教学结构的转变、( )与( ) 。
【判断题】灰砂砖自生产之日起,应放置1个月以后,方可用于砌体的施工。