staff 員工

recruit 招募，招聘

tablet 平板電腦

software 軟件

constantly 持續(xù)不斷地

upgrad 升級，更新

printed books 紙質(zhì)書

distract 使分心

emit 釋放

radiation 輻射

exhaustion 枯竭，耗盡

答案：CADB

administration 行政管理人員

initial expenditure 創(chuàng)業(yè)經(jīng)費