用配位滴定法测定硫酸锌含量时,所使用的指示剂是
A.甲基红
B.酚酞
C.淀粉
D.铬酸钾
E.铬黑T
参考答案:E
莱菔子具有的功效是
A.消食除胀
B.固精止遗
C.化坚消石
D.降气化痰
E.活血化瘀
— ______ wet weather it is today!
— But it's good for vegetables [ ]
A. What
B. How
C. What a
D. How a