我的宝宝两个月了,明天去社区接种。我以前只听说过脊灰疫苗,就像普通的流感疫苗一样,昨天才发现脊灰疫苗也分为两种,一种叫salk,另一种叫sabin,我听说过注射和糖丸,脊灰疫苗也分为两种,现在不知道选择脊灰疫苗
as a Mac outsider it seems that two popular programming languages on the Mac appear to be Objective C and Ruby.