在班级管理中，不论是工作目标、任务的确定，还是教育方法的采用，都必须以（）为前提。 调查研究。 组织号召。 组织推动。 制度规范。
作仆人的要用什么心听从肉身的主人？
以下属于金融衍生品的特征的有（）。 高成本性。 高杠杆性。 高风险性。 低收益性。
衡量资金时间价值大小有两个尺度，即（）和（）。
Which two are effects of connecting a network segment that is running 802.1D to a network segment that is running 802.1w？（） the entire network switches to 802.1D and generates BPDUs to determine root bridfe status.。 A migration delay of three seconds occurs when the port that is connected to the 802.1D bridge comes up。 The entire network reconverges and a unique root briddge for the 802.1D segment， and a root bridge for the 802.1W segment， is chosen。 the first hop 802.1w switch that is connected to the 802.1D runs entirely in 802.1DCompatibility mode and converts the BPDUs to either 802.1D or 802.1W segments of the network。 Classic 802.1D timers， Such as forward Delay and Max-age， will only be used as a backup， and will not be necessary if point-to-point links and edge prots are properly identified and set by the administrator.。
消沉、松懈、颓丧、灰心属于（）情感。
