I like the music _______ I can sing along with. [ ]
A. what
B. that
C. who
D. why
答案:B
锌缺乏症患儿每日补充元素锌为()
A.0.5~1mg/d
B.1~2mg/d
C.2~3mg/d
D.3~4mg/d
E.4~5mg/d
样品消解过程中所加的酸分别是盐酸、硝酸和磷酸。