机动车仪表板上(如图所示)亮表示什么?()
A.前雾灯打开
B.后雾灯打开
C.前照灯近光打开
D.前照灯远光打开
参考答案:B
I spent three hours_____ this book.
A. finish reading
B. to finish reading
C. finishing reading
人类什么时候第一次使用原子弹作战?