题干

A、B、C、D四种物质均易溶于水,分别按下列条件配成溶液,其中物质的量浓度最大的是(  )

A:10 mL 5mol•L﹣1的A溶液加水配制成100 mL溶液

B:9.2 g B物质(式量为46)溶于水配成100 mL溶液

C:1.806×1023个C的分子溶于水配成100 mL溶液

D:0.1 moL D物质溶于100 mL 2.5 mol•L﹣1的D溶液中

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D

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阅读下面材料,从每题所给的A、B、C、D四个选项中选出最佳选项。

     I am off on a trip on my own. Yes ! Alone! I can't wait to get going to Europe to see some cities I really want to visit. It is great because I can choose what I want to do in each city. I am going to travel by train on the Eurorail.

     The train trip was fast and the views of the countryside were amazing. Now I am in Salzburg, Austria. The quiet hills of Austria are a great place to relax. The movie The Sound of Music was filmed around this area. Mozart, the famous musician, was from here. I listened to some of his classical music.

     The train ride to Amsterdam was a long one. It gave me time to write some postcards to send back home. Amsterdam is a fun city, full of friendly locals and many tourists. I spent the whole day visiting the art museums here. The museum about the famous Dutch artist Van Gogh is filled with history and beautiful art. I took a boat ride and saw local people in traditional dress. I even got to taste some delicious Dutch cheese.

     Copenhagen, Denmark, is one of the safest places in the world. I spent a busy and nice day at the Tivoli Amusement Park. It is a huge park which even has concerts and dance shows. Hans Christian Anderson, a famous writer of children's books, was born in this city. I found a lovely bookshop and bought two of his fairy tale books, The Little Mermaid and The Ugly Duckling. My travels alone are done! What an adventure this trip has been! I love it.