【单选题】第三代计算机采用______作为主要的电子元器件。
【简答题】He introduced better methods of (manage) ______ in this company.
【单选题】_____ difficulties he comes across , he cam manage to get them over .
【简答题】VC-12 的一个复帧由( )字节组成,信号速率为( )。
【单选题】____ difficulties he comes across he can manage to get them over.
【单选题】液氮超低温保藏法中使用的冷冻保护剂是()
【简答题】指出下列各组辅音的区别特征: [p’]—[p];[p]—[b];[ts]—[ts’];[f]—[v];[t’]—[k’]。