问题 单项选择题

在Campylobacter-BAP培养基上下列哪种试验可以用于鉴别弯曲菌。()

A.还原亚硝酸盐

B.尿素

C.马尿酸水解试验

D.产H2S

E.触酶

答案

参考答案:C

解析:

A、B、D所有的弯曲菌都是阴性,E所有的弯曲菌都是阳性。

选择题

下列两幅图反映了中国历史上的两次巨大变化的史实,仔细阅读下图并根据所学知识回答问题。

请回答:

(1)图一、图二所反映的历史性巨变分别是什么?

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

(2)这两次巨变到2009年分别是多少周年了?由这两次巨变你能得出怎样的结论?

                                                                                                                                                            

                                                                                                                                                            

(3)简述这两次巨变的共同之处。