题干
Rt△ABC中，∠C=90°，若AB=a，∠A=θ，则AC的长为（ ）．
A：a•sinθ
B：a•cosθ
C：a•tanθ
D：a•cotθ
答案(点此获取答案解析）
B
Rt△ABC中，∠C=90°，若AB=a，∠A=θ，则AC的长为（ ）．
A：a•sinθ
B：a•cosθ
C：a•tanθ
D：a•cotθ
不能最终被氧化为﹣COOH；
in Hong Kong were more romantic, 34.3 percent of them __________ that love mattered the most.