《蓝花花》是下列哪一个歌种的代表曲目？（）
A.花儿
B.信天游
C.山曲
D.爬山调
参考答案：B
计算：1-2=（ ），化简-[-（-0.3）] =（ ）。
________ the police thought he was the most likely one，since they had no exact proof about it，they could not arrest him.
A．Although
B．As long as
C．If only
D．As soon as
