金属探测门应配有声音报警信号调节设置,可以调节持续时间,()和音量。
A.音色
B.音调
C.报警时间
D.间断时间
参考答案:B
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Though an active politician, she succeeded in balancing the _______ she played both at home and in society.
A.characters
B.parts
C.performances
D.activities
Since the shipment consists of seasonable goods, it is important that it is ________as soon as possible.
A.deleted
B.demanded
C.delivered
D.detached