F-FDG作为肿瘤显像剂的原理是基于（）。

A.多数肿瘤细胞无氧葡萄糖酵解异常旺盛

B.肿瘤细胞膜上葡萄糖转运蛋白对F-FDG转运速率相对增快

C.F-FDG在肿瘤细胞内经己糖激酶作用转变为6-磷酸F-FDG而滞留在细胞内

D.肿瘤局部F-FDG摄取量与肿块内成活的肿瘤细胞数成正比

E.以上都对

Prior to the availability of enterprise EDM, locating a document over a LAN could be difficult, and over a WAN (1) nearly impossible. With the model for collaborative work spreading, and with more users sharing (2) documents through e-mail and the Internet, enterprise EDM had become a necessity.

Many businesses are finding their greatest competitive advantage is the ability to harness the document (3) lifecycle. EDM systems manage this lifecycle from creation, revision, storage and (4) retrieval to routing and workflow. They also allow users to work on documents collaboratively.

Reusability of information is EDM’s main benefit, as well as the key to creating the paradigms that drive business process (5) reengineering.

3（）

A．database

B．controller

C．lifecycle

D．center