题型:填空题 若一个网络系统中有150个信息点,按照EIA/TIA586标准进行结构化布线,则布线工程需要准备RJ-45头的总量是______个。A.600 B.780 C.618 D.690 查看答案
题型:填空题 I _____ have written to him because he phoned me shortly afterwards.A.ought toB.mustC.couldn’tD.needn’t 查看答案