有权批准或决定逮捕的机关是（）。
A、公安机关、审判机关
B、检察机关、公安机关
C、检察机关、审判机关
D、国家安全机关
参考答案：C
She volleyball regularly for many years when she was young.
A．was playing
B．played
C．has played
D．had played
设x＞0，y＞0且3x+2y=12，则xy的最大值是______．
