【单选题】If a seaplane is not used as a means of transpiration on water but is capable of being used so,it shall ().
A.
be regarded as a vessel not under command
B.
be regarded as a vessel underway
C.
be regarded as a vessel
D.
be regarded as a sailing vessel
【单选题】最小组段无下限或最大组段无上限的频数分布资料,描述其集中趋势的指标宜选( )。
【单选题】最小组段无下限或最大组段无上限的频数分布资料,集中趋势指标是
【单选题】最小组段无下限或最大组段无上限的频数分布资料,描述其集中趋势的指标是
【单选题】为了使直流电动机反转,应采取( )措施可改变主磁场方向。
【判断题】Vessel includes seaplane. ( )
【单选题】最小组段无下限或最大组段无上限的频数分布资料宜用 表示其平均水平
【判断题】Seaplane includes non displacement craft. ( )
【单选题】最小组段无下限或最大组段无上限的频数分布资料,用来描述其集中趋势用