通过甲状腺素促进蛋白质合成的元素是()
A.锌
B.铜
C.铁
D.钙
E.碘
参考答案:E
自动喷水系统系统当管道公称直径≥50mm时,配水干管上设置防晃支架的间距不宜大于()
A.30m
B.20m
C.15m
D.5m
I don't think she will agree with us, _ ?
A.will she
B.won't she
C.don't you
D.do you