3．【答案】A

　　【解析】推理判断题。文章的两个文字框中附上了医生以及使用者的推荐语，由此可以推知，这篇广告是通过使用推荐者意见增加其可信度的，故选A项。

　　B

　　(2016山东临沂高三10月检测，D)

　　You can't always predict a heavy rain or remember your umbrella.But designer Mikhail Belyaev doesn't think that forgetting to check the weather forecast before heading out should result in you getting wet.That's why he created Lampbrella, a lamp post with its own rain sensing umbrella.

　　The designer says he came up with the idea after watching people get wet on streets in Russia.“Once, I was driving on a central Saint Petersburg street and saw the street lamps lighting up people trying to hide from the rain.I thought it would be appropriate to have a canopy(伞蓬) built into a street lamp.” he said.

　　The Lampbrella is a standard­looking street lamp fitted with an umbrella canopy.It has a built­in electric motor which can open or close the umbrella on demand.Sensors(传感器) then ensure that the umbrella offers pedestrians shelter whenever it starts raining.

　　In addition to the rain sensor, there's also a 360° motion sensor on the fiberglass street lamp which detects whether anyone's using the Lampbrella.After three minutes of not being used the canopy is closed.

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