问题 单项选择题

引起伤寒不断传播及流行的主要传染源是()

A.潜伏末期病人

B.极期病人

C.恢复期带菌者

D.慢性带菌者

E.恢复期病人

答案

参考答案:D

问答题

       有人说,制度革新和技术革新是历史前进的两个车轮。世界近代史上英国的发展就有力地说明了这点。请回答下列问题:

(1)英国的“制度革新”和“技术革新”分别指的是什么事件?

                                                                                                                                                             

(2)英国这两次不同的革新分别是在什么时候开始的?

                                                                                                                                                             

(3)这两次革新分别是怎样推动英国及世界历史发展的?

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                             

单项选择题