土地复垦是指对在生产建设过程中，因挖损、塌陷、压占等造成破坏的土地，采取整治措施，使其恢复到可供利用状态的活动。( )
参考答案：对
Two________teachers and four________students were praised at the meeting yesterday. [ ]
A. women; girl
B. woman; girl
C. woman; girls
D. women; girls
下列算法加密速度最慢的是
A．RSA
B．3DSE
C．RC5
D．IDEA
