Bluetoothisaradiotechnologyall

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更新 2022-09-03
科目英语
题型单选题
难度中等
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Bluetooth is a radio-technology allowing cell phones, wireless earphones, etc. to ______ radio signals, so that people can contact each other within 10 metres.

A．match	B．share
C．protect	D．exchange

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A note was on the blackboard ______ “All those who have a fever must leave school right now”.

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—He ought to have been warned of the danger.
—______, but he wouldn’t listen to me.

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All the task ______ ahead of time, they decided to go on holiday for a week.

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