【简答题】A.She asked for $15. B.She donated $50. C.She requested $20. D.She gave $10.
【简答题】计算:cos30 °tan30 °+sin60 °tan45 °tan60°。
【简答题】观察(1)tan10°tan20°+tan20°tan60°+tan60°tan10°=1 (2)tan5°tan10°+tan10°tan75°+tan75°tan5°=1 由以上两式成立,推广到一般结论,写出你的推论______.
【简答题】A.She applied for a science scholarship and asked for help from her friends. B.She applied for a music scholarship and asked for help from her parents. C.She hasn't thought about this problem. D.She n...
【单选题】在RGB模式的图片当中,( )颜色表示有这种色光
【简答题】A.She goes home for lunch. B.She gets interested in what she is reading. C.She spends her time shopping. D.She doesn't wake up in time.