四(2)班有男生25人,女生23人.体育课上,周老师把他们每8人站一队,一共可以站多少队?列综合算式.
(25+23)÷8,
=48÷8,
=6(队).
答:一共可以站6队.
Sorry, I didn’t hear you. I to the music.
A.just listened
B.was just listening
C.has just listened
D.had just listened
细胞内液()细胞外液()
A.阳离子带正电荷总数与阴离子所带负电荷的总数相等
B.体液呈电中性
C.二者均有
D.二者均无