正确答案: B

板框过滤器

题目：滤过是制备注射剂的关键步骤之一，下列哪种滤器起不到精滤作用（ ）。

解析：B

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]

point

[单选题]Which of the following is true according to the text?

The promoters usually just care about profits.

[单选题]

B． Generally C． Gradually D． Probably

Gradually

[单选题]What does the author want to tell us most? （ ）

Women' s brains are better organized for language and communication

[单选题]According to Harry Morrison, businesses .

will benefit from cutting carbon emissions

[单选题]二、（9分）阅读下面的文字，完成5-7题。

生态道德教育是要将生态伦理学的思想观念变成人们的自觉行动，引导人们以道德理念去自觉维系生态环境的平衡与不可再生资源的可持续利用。