下列哪个是E－Commerce和E－Business的主要区别所在：（)

In China, Taobao is one of （)e－commerce sites.

下列哪个房室增大后，食管受压后移（)。A、右室B、左房C、左室D、右房E、右房和右室

（） is exactly analogous to a marketplace on the Internet.A.E－Commerce B.E－Cash C.E－Mail D

E－commerce is presenting a lot of new jobs at level.A) entryB) entranceC) entrenchment

电子商务(e-commerce)和电子业务(e-business)的区别是什么?

E-commerce refers to Internet shopping online stock and bond transactions the downloading and elling of various kinds of merchandise and business-to-business transactions.()