【单选题】CTCS-3级列控系统是采用( )方式实现车地信息传输。
【简答题】阅读理解 'When one of the doctors criticizes (批评) me, I get defensive.I feel like a child again, being scolded, and I want to explain that I'm not wrong, ' says Viola, a nurse.This is a common reaction to...
【简答题】“When one of the doctors criticizes(批评) me, I get defensive. I feel like a child again, being scolded, and I want to explain that I’m not wrong,” says Viola, a nurse. This is a common reaction(反应) to ...
【单选题】已知配制C35混凝土所用普通水泥P.O52.5的实际强度是55MPa,采用碎石,其回归系数αa=0.46,αb=0.07,该施工单位的强度标准差是3.0 MPa,则W/C应是:( )。
【单选题】回归系数和相关系数的符号是一致的,其符号均可用来判断现象( )。
【单选题】已知配制C35混凝土所用普通水泥P.O52.5的实际强度是55MPa,采用碎石,其回归系数αa=0.53,αb=0.20,该施工单位的强度标准差是5.0 MPa,则W/C应是:( )。
【单选题】已知配制C35混凝土所用普通水泥P.O52.5的实际强度是55MPa,采用碎石,其回归系数a a =0.46,a b2 =0.07,该施工单位的强度标准差是3.0MPa,则W/C应是:()