正常情况下,以下物质属于人体内环境组成成分的是( ) ①血红蛋白 ②葡萄糖 ③无机盐 ④激素 ⑤尿素
A:①②③④⑤
B:②③④⑤
C:②③④
D:②③
发现电流周围存在磁场的物理学家是( )
find out, feel like, quite a few, bring out, come out, of course, at least, make up, care about, dress up
下列划线字的注音没有错误的一项是( )