【简答题】相关系数,用于反映 条件下,两变量相关关系的密切程度和方向的统计指标。
【简答题】何谓冲击韧性?影响冲击韧性的主要因素有哪些?
【判断题】Luxury soft sleeper is the top level sleeper and the most expensive ticket on a train and equipped by a lot of trains.
【单选题】冲击韧性指标是通过冲击试验确定的,冲击韧性值越大,说明()。
A.
钢材断裂前吸收的能量越多,钢材的冲击韧性越差
B.
钢材断裂前吸收的能量越少,钢材的冲击韧性越好
C.
钢材断裂前吸收的能量越少,钢材的冲击韧性越差
D.
钢材断裂前吸收的能量越多,钢材的冲击韧性越好
【单选题】There are only ( ) comfortable bunks in a luxury soft sleeper compartment, which is equipped with an independent toilet, sofa, tea table, TV and some other facilities equal to a soft sleeper.
【判断题】Luxury soft leeper is the top level sleeper and the mot expensive ticket on a train and equipped by a lot of trains.
【简答题】网络工程项目管理的主要任务是:_________、_________、_________。
【判断题】luxury soft sleeper is the top level slpeer and the most expensive ticket on a trian and equiped by a lot of trains
【判断题】全国高校远程教育协作组的主要任务是制定网络教育管理规定。()
【简答题】冲击韧性指标是通过标准试件的弯曲冲击韧性试验确定的。