Small businesses face unique customer challenges, which three challenges are small businesses looking to overcome？（） ["operational efficiency","data center deployments","cost containment","technical staffing","customer responsiveness","employee training"]
腰带
Refer to the exhibit. Which SSH sessions will the SSH server accept?（） [" version 1 only"," version 2 only"," versions 1 and 2"," all versions before 1.99"]
用一夹一顶或两顶尖装夹轴类零件，如果后顶尖轴线与主轴轴线不重合，工件会产生（）误差。 ["圆度","跳动","圆柱度","同轴度"]
3.5英寸软盘的一个角上有一个滑动片，如果移动该滑片露出小孔，则该软盘（）。 ["既能读出信息也能写入信息","不能读出信息也不能写入信息","不能读出信息、能写入信息","能读出信息、不能写入信息"]
点阵常数
