题目内容

8 下面实现动态注册广播,请补全代码?private BatteryReceiver mBatteryReceiver ;定义广播接收器对象; private void initData() { EventBus.getDefault().register(this);//将Activity获得注册到EventBus mBatteryReceiver = new BatteryReceiver();//初始化广播接收器对象 IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);( ?); }

A. super.register(mBatteryReceiver, filter)
B. super.registerBroadCast(mBatteryReceiver, filter)
C. super.registerReceiver(mBatteryReceiver, filter)
D. super.registerBroadCastReceiver(mBatteryReceiver, filter)

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n(>0)个结点的二叉树________

A. 是有序树
B. 度不超过2
C. 高度不小于n/2
D. 高度不超过n
E. 每个结点的度为2

20个结点的二叉树,最小高度是________

某二叉树高度为6,其根结点只有左子结点没有右子结点,则该二叉树最多有________个结点

某二叉树中有9个叶结点,则该树最少有________个结点

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