题干

(2012•盐城)今年央视3.15晚会曝光,少数不法厂家向液化石油气中掺入了二甲醚(C2H6O),二甲醚会对液化气罐的配件造成腐蚀,存在安全隐患.下列关于二甲醚的说法错误的是(   )

A:属于氧化物

B:每个分子中含有9个原子

C:碳、氢、氧元素的质量比为12:3:8

D:碳元素的质量分数约为52.2%

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A

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    Amsterdam is a special city. There are many places you should not miss during your visit. Here is our list of the best.

Amsterdam canal ring

    The city old centre is formed from canal rings, which give you the feeling of space, freedom and peace. Walk through these canal streets or better — take a trip by renting a boat yourself. Another way to explore the Venice of the North is to take a ride on a bicycle. Any way you decide for - enjoy this city.

The National Maritime Museum

    The Maritime Museum is an attractive place to visit, especially with children. With many attractions in it, this colourful and enjoyable museum will help you understand the history of the Netherlands - a small nation which was one of the world's greatest sea powers.

Amsterdam Brown Cafe

    When you enter Amsterdam old cafes called Brown, at first it will seem too much from the past and too crowded, but the atmosphere is unique. Relax and watch - most of people around will be locals. Feel like one of them — the real Amsterdammers.

Civic Guards Gallery

    This gallery is filled with old paintings from the Dutch Golden Age. The exhibited canvas may be not always the masterpieces of art, but these group portraits of Amsterdam citizens and their wives are an exquisite (精致的) document of the Dutch civilization and culture centuries ago.

To avoid waiting lines we advise you to buy your tickets in advance online through our Amsterdam attractions and museums tickets webpage.