问题
单项选择题
使对苯二胺显色的试验是（）
A.O／F试验
B.枸橼酸盐利用试验
C.吲哚试验
D.氧化酶试验
E.硝酸盐还原
答案
参考答案：D
解析：氧化酶是细胞色素呼吸酶系统的最终呼吸酶，具有氧化酶的细菌，首先使细胞色素C氧化，再由氧化性细胞色素C使对苯二胺氧化，生成有色醌类物。
搜题请搜索小程序“爱下问搜题”
使对苯二胺显色的试验是（）
A.O／F试验
B.枸橼酸盐利用试验
C.吲哚试验
D.氧化酶试验
E.硝酸盐还原
参考答案：D
解析：氧化酶是细胞色素呼吸酶系统的最终呼吸酶，具有氧化酶的细菌，首先使细胞色素C氧化，再由氧化性细胞色素C使对苯二胺氧化，生成有色醌类物。
When we read books we seem to enter a new world. This new world can be similar to the one we are living in, or it can be very 31 .Some stories are told 32 they were true. Real people who live in a 33 world do real things; in other words, the stories are about people just like us doing what we do. Other stories, such as the Harry Potter books, are not 34 . They are characters and creatures that are very different from us and do things that would be 35 for us. But there is more to books and writing than this. If we think about it, even realistic writing is only 36 . How can we tell the difference between what is real and what is not real? For example, when we read about Harry Potter ,we 37 seem to learn something about the real world. And when Harry studies magic at Hogwarts, he also learns more about his real life than 38 . Reading, like writing, is an action. It is a way of 39 . When we read or write something ,we do much more than simple look at words on a page. We use our 40--which is real—and our imagination—which is real in a different way --- to make the words come to life in our minds. Both realism and fantasy(幻想) 41 the imagination and the “magic” of reading and writing to make us think. When we read 42 realistic, we have to imagine that the people we are reading about are just like us, even though we 43 that we are real and they are 44 . It sounds 45 ,but it works. When we read, we fill in missing information and 46 about the causes and effects of what a character does. We help the writer by 47 that what we read is like real life. In a way, we are writing the book, too. Most of us probably don’t think about what is going on in our 48 when we are reading. We pick up a book and lose 49 in a good story, eager to find out what will happen next. Knowing how we feel 50 we read can help us become better readers, and it will help us discover more about the real magic of books.
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