A：位移
B：路程
C：力
D：速度
—How is it going?— ________.
如果tanα=0.213，那么锐角α的度数大约为（ ）
我国幅员辽阔，区域差异显著。阅读“中国局部略图”，回答下列问题。
— Linda often to help her classmates with their English.
— What a kind girl!
