土地所有权可以用于抵押。( )
参考答案：错
解析： 土地所有权不可以用于抵押。
—What were you doing when Mike ______ you last night?
—I was brushing my teeth. [ ]
A. was phoning
B. phoned
C. is phoning
D. phones
打开一个数据库的命令是______。
A．USE
B．USE DATABASE
C．OPEN
D．OPEN DATABASE
