问题 单项选择题

银杏内酯是

A.环烯醚萜苷类化合物
B.二萜类化合物
C.肽类化合物
D.有机酸类化合物
E.倍半萜类化合物

答案

参考答案:B

观察下图某同学绘制的关于中国近现代外交的年代尺,回答问题:

请回答下列问题:

(1)图A中的谈判场景出现在哪次战争后?签订了哪个不平等条约?

                                                                                                                                                            

(2)图B反映了哪次重要的国际会议?周恩来提出了什么方针,为此次会议的圆满成功奠定了基础?

                                                                                                                                                            

(3)哪一次外交成就让图C中的乔冠华开怀大笑?

                                                                                                                                                              

(4)你认为哪一项外交成就的图片可以放在D处?

                                                                                                                                                             

(5)纵观中国外交地位的变化,谈谈你的认识。

                                                                                                                                                             

                                                                                                                                                             

单项选择题