SW-8型机采系统效率多参数测试诊断仪位移测量范量为（）。
A、0~5m
B、0~3.5m
C、0~8m
D、0~9m
参考答案：D
测试人员早期参与到需求获取和分析中，有助于 ______。
A．加深测试人员对需求的把握和理解
B．提高需求文档的质量
C．提高测试效率
D．以上全部
Electronic computers (), the complicated mathematical operations, such as weather forecast and the control of satellites, can be done quickly and accurately.
A. being used
B. used
C. having been used
D. to be used
