题型:解答题 判断由下列命题构成的p∨q,p∧q,非p形式的命题的真假:(1)p:负数的平方是正数,q:有理数是实数;______(2)p:2≤3,q:3<2;______(3)p:35是5的倍数,q:41是7的倍数.______. 查看答案
题型:单项选择题 One feature of () is that it is possible to arrange for a single message to be sent to a large number of other users simultaneously.A.FaxB.IP telephoneC.Data ProcessingD.E-mail 查看答案