简述《巴黎公约》所确立的专利保护的基本原则。

After many years both countries have come to realize that neither side could ever succeed in getting rid of _____ by means of war.

A．other

B．another

C．the other

D．others

830÷5，商是______位数，是______．

下列检查卵巢功能准确性最高的方法是（）

A.B超检查

B. * * 细胞学检查

C.基础体温测定

D.子宫内膜病理检查

E.X线检查

大气环流促进高低纬．海陆间的热量和水分的交换。

While in university,  we were offered a number of after school activities to________our social skills.[      ]

A. create  

B. grow

C. develop  

D. settle