【简答题】Direc tions: In this section you will hear a recorded short passage. The passage is printed on the test paper, but with some words or phrases missing. The passage will be read three times. The first r...
【单选题】基孔制配合是基本偏差为一定的孔的公差带与不同基本偏差的轴的公差带形成各种配合的一种制度。标准规定孔的下偏差作为基本偏差,代号为( ),数值为零。
【多选题】按照网络的覆盖范围对计算机网络可以分成()