题干

下表是小明记录的今年雨季一周河水的水位变化情况(上周末的水位达到警戒水位).

星期

一

二

三

四

五

六

日

水位变化/米

+0.20

+0.81

﹣0.35

+0.03

+0.28

﹣0.36

﹣0.01

注:正号表示水位比前一天上升,负号表示水位比前一天下降.

(1)本周哪一天河流的水位最高?哪一天河流的水位最低?它们位于警戒水位之上还是之下?与警戒水位的距离分别是多少米?

(2)与上周相比,本周末河流水位是上升了还是下降了?

上一题 下一题 0.0难度 选择题 更新时间:2018-12-07 01:57:43

答案(点此获取答案解析)

解:(1)设警戒水位为0,则:

星期一:+0.20米,星期二:+1.01米,星期三:+0.66米,星期四:+0.69米,星期五:+0.97米,星期六:+0.61米,星期日:+0.60米.

所以本周星期二河流水位最高,位于警戒水位之上1.01米,星期一河流的水位最低,位于警戒水位之上0.20米.

(2)跟上周相比,本周的水位上升了.

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    Guided Walking Week April 2016

    Dates: April 30th-May 7th 2016

    Location: Abdet, Costa Blanca

    A week of guided walking in the mountains around Abdet. Highlights include the climbing of Valencia's highest summit (Sierra de Aitana), traveling completely around the impressive Puig Campana, and several explorations in the Sierra de Aitana. Ancient trails lead through spectacular canyons(峡谷) to abandoned settlements situated high in the mountains. You will discover the snow trader routes which lead from the incredible snow holes high in the mountains down to the villages and towns on the coast. These years, golden eagles have made a return to this area, and you may also see other animals—wild goats, foxes, wild pigs and red squirrels.

    As part of the week you are invited to help clear some local walking paths. This involves clearing collapsed (坍塌的) walls and rocks, cutting back fallen trees. This is of course optional and is just for half a day, it's actually great fun!

Price:$499

Includes:

    Accommodation in the beautiful mountain village of Abdet

    All food-good home cooking

    Beer, wine, soft drinks

    Snacks and post walk treats

    Packed lunches & drinks(except café/bar visits)

    Expert guiding

    Photos/Videos of your days in the mountains

    Airport pick-up/return $25 each way(fly to Alicante)

    Single room supplement $75

    To book or get further information, please contact info@abdet.com.