Football Legend—Pele! Everyone will laugh at you if you don't know about Pele, the most famous football player in Brazil. Because of his great devotion to the __16__ of football, he is always __17_
单词 1. These stores like ______( 展示) their goods in large windows. 2. You break the law if you drive without a driving _______( 执照)。 3. When you buy something from a shop , don’t forget
其中i，j为互相垂直的单位向量，又
，则实数m =（ ）。
∵
，
，
∴
。故选