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问题 多项选择题

下列对服务流程中服务顾问交互式预检环节要点描述正确的是？（）

A.清楚的让客户理解车辆状况

B.专业化的说明

C.注意客户的安全

D.预估的完工时间

答案

参考答案：A, B, C, D

单项选择题

PDH数字复接是将几个低次群在（）的空隙上叠加合成高次群。

A.速率

B.幅度

C.频率

D.时间
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单项选择题

A typical (160) language contains an applicative sub-language which approximates the mathematical abstractions of "timeless" functions applied to "spaceless" values, where the actual operation sequences and use of storage space during expression evaluation are organized behind the (161) . In this setting, values are data structures of low volume, typically a few computer words or less, which means that an illusion of spacelessness can be realized by having (162) results during expression evaluation stored at the discretion of the language implementation, and effecting parameter (163) and (164) operations through value copying.

A．foreground

B．background

C．screen

D．scenes
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