()是客户对实验室出具的检测数据和结果提出书面异议。
A、申诉
B、投诉
C、上诉
D、抱怨
参考答案:A
对钢、铜、银及其合金基体而言,金镀层为阴极性镀层。
The man sat ________ the bus, because he is the driver.
A.in front of
B.at front of
C.in the front of
D.the front of