单项选择题
A.保存 B.全部保存 C.另存为 D.关闭
A.1,3,5,7,9 B.1,3,5^7,9 C.1~9 D.1,3,5—7,9
A.<Ctrl+PgUp> B.<Shift+PgDn> C.<Ctrl+Home> D.<Ctrl+End>