Students work by theymselves or with a partner to complete assignments , which sometimes involve proofs 学生们独自或和一个伙伴?瓿膳级?婕爸鞯?作业。
2.
A selfcontained portion of a system that performs one of the major system functions usually with only minimal interaction with other portions of the system 系统中的一个独立的部分,它?瓿芍飨低彻苤?通常与系统的其它部分仅有很小的交互作用。
