用一根质地均匀的粉笔在黑板上写字,粉笔变短了,下列说法中错误的是[ ]
A、粉笔的质量变小
B、粉笔的体积变小
C、粉笔的密度变小
D、粉笔的重力变小
答案:C
Prior to the availability of enterprise EDM, locating a document over a LAN could be difficult, and over a WAN (66) impossible. With the model for collaborative work spreading, and with more users sharing (67) 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 (68) . EDM systems manage this lifecycle from creation, revision, storage and (69) 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 (70) .
A.personal
B.available
C.structural
D.nearly
使用移液管时,用左手大拇指和中指拿住管颈标线上方,把管的尖端插入溶液中,右手拿洗耳球。