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某校高三年级共有30个班,学校心理咨询室为了了解同学们的心理状况,将每个班编号,依次为1到30,现用系统抽样的方法抽取5个班进行调查,若抽到的编号之和为75,则抽到的最小的编号为__.解析:系统抽样的抽取间隔为=6.设抽到的最小编号为x,则x+(6+x)+(12+x)+(18+x)+(24+x)=75,所以x=3.
I was told that some of the consequences could be eating and drinking difficulties and voice loss (as they would be carrying out the surgical procedure through the front of my neck and having to decompress my spinal cord by going via my trachea and oesophagus). I told my consultant that I...
Trachea issue? Get a ‘Halti’ or ‘Gentle leader’—which looks like a halter, and you lead the dog around by the face. Now, the collar doesn’t train the dog, but you will find it easier to get the dogs’ attention if the dog knows you are at the end of the leash & can ...
She has also started to do ‘old man’s cough’ throughout the day, and so after getting a clean bill of heart health from the vet, Joe at Whiskers, convinced me that her trachea would benefit from getting off leash/collar. So, too many dollars later she is sporting a harness that ...