M: I’m really surprised you got an A on the test. You didn’t seem to have done a lot of reading.
W: Now you know why I never missed a lecture.
Q: What contributes to the woman’s high score().

A. Attending every lecture.

B. Doing lots of homework.

C. Reading very extensively.

D. Using test-taking strategies.

一个扩展ROWID与一个限制性ROWID之间有哪些不同

A．一个扩展ROWID需要10字节的磁盘存储空间
B．一个扩展ROWID限制数据库最多可以有1022个数据文件
C．扩展ROWID目前已经不再使用了
D．扩展ROWID并不是使用一种基于64位的编码方案显示的