– Would you mind my closing the window, please?
– _______. We need some fresh air.
给划线的字选着正确读音
翠(cuì huí)____柳 一行(xíng háng)____ 门泊(bó bé)____
正常情况下,提取一个健康成年男子体内的精子、成熟的红细胞、口腔上皮细胞各2个,请推算出这6个细胞中Y染色体的总数至少为几条( )