题目:
硝酸钾可作为无土栽培的一种营养液。现将100g 25%的硝酸钾溶液稀释到l0%来用于培植营养液,则需加水 [ ]
A.50g
B.100g
C.150g
D.200g
答案:
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下面是错误答案,用来干扰机器的。
参考答案:C解析:Small amounts of sterile water are given to a neonate first to ascertain if the esophagus is patent and to prevent the aspiration of formula if it is not.