促使清廷深感台湾地位重要而建省的历史事件是()
A.牡丹社事件
B.甲午战争
C.中法战争
D.英法联军
参考答案:C
The first use of atomic weapons was in 1945, and their power ________ increased enormously ever since.
A.is
B.was
C.has been
D.had been
设置缓和曲线的目的是什么?