系统测试是针对整个产品系统进行的测试，目的是验证系统是否满足了需求规格的定义，找出与需求规格不符或与之矛盾的地方，从而提出更加完善的方案。
A. 对
B. 错
利用测线仪对所有网络链路进行通断检测，对未接通的线路进行整改。
A. 对
B. 错
My family ____on my father's unemployment benefit after he lost his job.
Many subway riders read books or listen to music in order to ____their time on the way to work.
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