单项选择题
A.移动B.还原C.删除D.复制
A、Ⅰ、ⅢB、Ⅱ、ⅢC、Ⅱ、ⅣD、Ⅰ、Ⅳ
A.They are simple and they operate mechanically.B.They can solve all kinds of difficult problems.C.Computers are so advanced that they will control human being someday in the future.D.They are not as complicated as human brain.
A.分散对齐B.两端对齐C.居中D.左对齐
A.可主张合同无效B.可主张撤销合同C.可主张解除合同D.可主张违约责任