位错的具有重要的性质，下列说法不正确的是（）。 ["位错不一定是直线","位错是已滑移区和未滑移区的边界","位错可以中断于晶体内部","位错不能中断于晶体内部"]
根据目前施行的学生体质测量方案，某大学二年级女生身高为169.1CM，体重为66.8KG，她属于下列哪个标准？（） ["较低体重","正常体重","超重","肥胖"]
（）、诊断功能、决策功能、（）是课程与教学评价的主要功能。
500千伏电压等级的输电线路的通道保护区边线外距离是（）。 ["10米","15米","20米"]
For what two purposes does the Ethernet protocol use physical addresses?（） [" to uniquely identify devices at Layer 2"," to allow communication with devices on a different network"," to differentiate a Layer 2 frame from a Layer 3 packet"," to establish a priority system to determine which device gets to transmit first"," to allow communication between different devices on the same network"," to allow detection of a remote device when its physical address is unknow"]
中国少年先锋队是中国少年儿童的（ ）。是学习（ ）的学校，是建设社会主义和共产主义的（ ）。
