程控交换机的处理机间的通信方式有通过PCM信道进行通信或采用计算机常用的通信结构形式,如();(),以太网三种。
参考答案:多总线,令牌环
关于腹腔壁层肿瘤,下列说法错误的是()
A.肿瘤沿腹膜面生长,呈板块状
B.肿瘤结节以腹膜壁层为基底向腹内突起
C.腹内脏器表面有肿块或板块状增厚
D.肿瘤结节可多发
E.合并大量积液
Which of the following is not a trouble confronting Air France ()
A.Deferred taxes being due.
B.The shrinking French market.
C.A four-day strike by pilots in September.
D.The war on Iraq.