问题
单项选择题
下列生化反应阴阳性对照菌株选择，错误的是（）
A.氧化酶试验：阴性－铜绿假单胞菌；阳性－大肠埃希菌
B.V－P试验：阴性－大肠埃希菌；阳性－产气肠杆菌
C.硝酸盐还原反应：阴性－乙酸钙不动杆菌；阳性－大肠埃希菌
D.触酶试验：阴性－A群链球菌；阳性－金黄色葡萄球菌
E.苯丙氨酸脱氨酶试验：阴性－大肠埃希菌；阳性－变形杆菌
答案
参考答案：A
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下列生化反应阴阳性对照菌株选择，错误的是（）
A.氧化酶试验：阴性－铜绿假单胞菌；阳性－大肠埃希菌
B.V－P试验：阴性－大肠埃希菌；阳性－产气肠杆菌
C.硝酸盐还原反应：阴性－乙酸钙不动杆菌；阳性－大肠埃希菌
D.触酶试验：阴性－A群链球菌；阳性－金黄色葡萄球菌
E.苯丙氨酸脱氨酶试验：阴性－大肠埃希菌；阳性－变形杆菌
参考答案：A
阅读下面短文，掌握其大意，然后从每小题所给的A、B、C、D四个选项中选出一个最佳选项，使文章完整、通顺。 My twin brother is called Daniel, and he is four___younger than me. Our birthdays are ____ on the 5th of January. We have the same eyes and noses. Most people say we ____ the same, but Daniel looks a little ____than me. We aren’t in the same class at school, ____ my parents want us to be a bit different. We often _____ the same way, but we choose different______ .I like red and he likes blue. I think we are very_____ .He is really, really active, and he_____ every day. He also plays computer games a lot but I don’t. At school I always come top, but he hardly ever does well_____ the exams. So teachers often say we are very different .
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