题干

下列对相关物质性质或性能的描述或事实的解释中,不合理的是(  )


A:生铁和钢的性能不同﹣﹣含碳量不同

B:CO与CO2的化学性质不同﹣﹣分子构成不同

C:金刚石和石墨的物质性质差异大﹣﹣碳原子结构不同

D:硫在空气中和在氧气中燃烧反应的剧烈程度不同﹣﹣氧气浓度不同

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答案(点此获取答案解析)

C

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    Guided Walking Week April 2018

    Date: April 30th—May 7th 2018

    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 walls and rocks, cutting back fallen trees. This is of course optional and is just for half a day, and 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@abdct.com.