题干

在生物组织中还原糖、脂肪、蛋白质的鉴定实验中,关于实验材料选择的叙述中,错误的是(    )

A:甘蔗茎、甜菜的块根等都含有较多的糖且近于白色,因此可以用于进行还原糖的实验

B:花生种子含脂肪多且子叶肥厚,是用于脂肪鉴定的理想材料

C:大豆种子蛋白质含量高,是进行蛋白质实验鉴定的理想植物组织材料

D:鸡蛋清含蛋白质多,是进行蛋白质鉴定的理想材料

上一题 下一题 0.0难度 选择题 更新时间:2018-09-04 11:29:24

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A

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    When I was ten years old I went to the USA to visit some family friends. I noticed something funny about the way everyone spoke English.

    One moment! I remember very clearly was at the beginning of the holiday, when my friend asked me if I wanted to order “French fries”. I couldn't imagine what they were. She was amazed that I had never tried them and she ordered a portion for us to share. When the waiter brought us some chips, I asked her where the French fries were. She pointed at the plate of chips! Later that week she said she was going to buy some “chips” from the supermarket. She came out with a packet of crisps(薯片)! How come?

    During that holiday we were also offered “biscuits” with our lunch. This was a very strange idea to me, because in England biscuits are sweet. I later realized that “biscuits” in America are salty snacks. What we call “biscuits', they call “cookies”.

    I was also embarrassed when a stranger told me she liked my “pants”. I wondered how she could see them! My mum then told me that they call “pants” what we call “trousers”, the outer clothing that you wear on your legs instead of inside clothing!

    I was disgusted when I saw an “eggplant” pizza on the menu in a restaurant. But I was puzzled how eggs can grow on plants. My dad ordered this pizza and it was covered in aubergines(茄子). “They call aubergines 'eggplant' in America!” he told me.

    I think part of the excitement of learning a language is learning about the differences that exist in how it is spoken in different places.