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【单选题】
在Windows 7桌面上,不能打开“资源管理器”口的操作是A.
先用鼠标左键单击“开始”按钮，然后系统菜单中选取“资源管理器”
B.
先用鼠标右键单击“开始”按钮，然后从弹出的菜单中选取“资源管理器”
C.
先用鼠标左键双击“计算机”图标，然后从窗口中选取“资源管理器”图标
D.
鼠标右键单击“桌面”，然后从弹出的菜单中选取“资源管理器”
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皮皮学刷刷变学霸
举一反三
【单选题】The story implies that the author's mother was______.
A.
critical
B.
fault-finding
C.
optimistic
D.
pessimistic
【单选题】The author's mother prepared the following food EXCEPT:
A.
roasted chickens
B.
brown bread
C.
mayonnaise
D.
rock-cakes
【单选题】Why did the author's mother beat him?
A.
Because she saw him playing with the lead cowboy.
B.
Because his brother informed his mother of his stealing.
C.
Because he had been chasing his neighbor's cats.
D.
Because he left the house without having told his mother.
【单选题】删除学生表中专业zno为空的学生记录,正确的命令是
A.
delete * from student where zno is null
B.
delete from student where zno=null
C.
delete from student where zno is null
D.
delete from student where zno is 'null'
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