在检查溶于碱性溶液而不溶于酸性溶液的药物中的重金属时,所用的显色剂是
A.硫代乙酰胺B.硫化氢C.硫化钠D.醋酸汞E.碘化钾
参考答案:C
4. It is _________ that you haven’t got the right answer. You have misunderstood our real intention.
A.sure
B.obvious
C.possible
D.Likely
酒店公共区域清洁保养工作的特点有哪些?