题目

下列有关葡萄糖的说法错误的是( )A．葡萄糖的分子式是C6H12O6           B．葡萄糖能发生银镜反应C．葡萄糖是人体重要的能量来源     D．葡萄糖与蔗糖是同分异构体  答案：D解析:葡萄糖中含有醛基，可发生银镜反应。蔗糖的分子式为C12H22O11，所以二者不可能是同分异构体，选项D错误，答案是D。 Read and match.读一读，把问答句配对。(1) Is there a library nearby? A. That’s true! It helps a street cleaner clean the streets quickly.(2) The boy looks so fat. B. Nearby? I’m not sure. But there is one near our school.(3) A street sweeper is useful. C. I think so. He weighs about fifty-five kilograms.(4) You like the life here? D. Yes! I like the mountains. I like the fresh air too!(5) Where can I buy flowers? E. Of course. There will be a large swimming pool.(6) Will there be any changes? F. Oh, there is a flower shop in front of the theatre.