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
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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