注册一个短信到来的广播事件需要在清单文件配置什么权限（ ） A: <uses-permission android:name="android.permission.SMS"/> B: <uses-permission android:name="android.permission.SEND_SMS"/> C: <uses-permission android:name="android.permission.RECEIVE_SMS"/> D: <uses-permission android:name="android.permission.RECEIVE_SEND_SMS"/>

在android中android:permission="android.permission.RECEIVE_BOOT_COMPLETED"权限是干什么的().

Android UI开发中，在GridLayout中如何设置某控件占3行（）。（ ） A: android:rowSpan="3" B: android:layout_column="3" C: android:layout_rowSpan="3" D: android:layout_columnSpan="3"

下列属性中，用于隐藏控件的属性是（ ）。 A: android:gone="visibility" B: android:visibility="true" C: android:visibility="gone" D: android:visibility="false"

下面属性中，哪个属性表示线性布局的方向是垂直的（ ） A: android:orientation="vertical" B: android:orientation="horizontal"  C: android:layout_gravity="center" D: android:layout_weight="1"

Which statement is right： A: Both message queue and unnamed pipe can send/receive messages between any two processes. B: Both message queue and unnamed pipe can send /receive messages with the specified type. C: Both message queue and named pipe can send/receive messages between any two processes. D: Both message queue and named pipe can send /receive messages with the specified type.

A. collect B. return C. send D. receive

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如果使用LinearLayout实现组件垂直排列那么在xml中应添加什么属性进行设置？（ ） A: android:orientation= "vertical" B: android:vertical= "true" C: android:orientation= "horizontal" D: android:horizontal="true"

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