these knowledge可数吗

knowledge不可数，意思是知识、学问、认识、知道。

例句

They successfully communicate their knowledge to others.

他们成功地把他们的知识传达给别人。

Danny shared his knowledge freely with anyone interested.

丹尼自愿与任何感兴趣者共享他的知识。

The syllabus lists the knowledge and competences required at this level.

教学大纲列出这一级水平要求掌握的知识和技能。

This technique brings life to instruction and eases assimilation of knowledge.

这种技术给教学带来活力，并使知识的吸收更加容易。

Teachers sometimes presuppose a fairly high level of knowledge by the students.

教师有时候假定学生的知识水平相当高。