一些以儿童为主的传染病,患者的年龄分布,集中位置偏向年龄小的一侧,称为()
A.正态分布
B.正偏峰分布
C.负偏峰分布
D.偏峰分布
E.对称分布
参考答案:B
______ the new life in Qingdao, the old man lived happily with his son after leaving his home in the countryside.
A.Accustomed to
B.Accustoming to
C.Having accustomed to
D.having used to
低压熔断器的作用是什么?