题目内容

某营养液配方中，硝酸钙浓度为560mg/L。那取500ml该营养液，其中硝酸钙的重量为mg。

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元素重量/L和摩尔/L都需要换算成，才能进行称量和配制。

营养液原料化合物的要求主要有

A. 纯度
B. 溶解度
C. 元素含量
D. 价格

以下哪些单位用于表示营养液的浓度？

A. mg/L
B. mol/L
C. EC
D. Pa

Choose the proper word from the KEY WORDS to fill in the blank in each of the following sentences, making changes when necessary.1. The captain did his best to ___ a sense of unity among the new members.2.We encourage all members to _ for the highest standards.3.Each step has some related _ tools.4.They also helped him through his recovery and _ after the surgery.5.She went to the bank to draw her ___.