All of the following are recognized distress signals under the Navigation Rules EXCEPT().
A. a green star signal
B. orange-colored smoke
C. red flares
D. the repeated raising and lowering of outstretched arm
请通过比喻说明,我们想解脱轮回必须要依靠上师和佛陀的教言精进修持。
在集中量数分析中,用来标示在一组数据中出现次数最多的标志值是()
A. 众数
B. 平均数
C. 中位数
D. 标准差