首先考虑可能的原因是为
A.急性肠胃炎B.泌尿系感染C.急性附件炎D.直肠癌E.盆腔脓肿经直肠和 * * 指诊发现波动性肿块向 * * 突出,有触痛。
参考答案:E
---Tom was late for class this morning again.
---You know, _______.
A.all good things come to an end
B.a leopard cannot change its spots
C.honesty is never too much practical
D.a work ill done must be twice done
构成EDI 系统的三个要素是______、通信网络以及______。