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"

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"

horizontal stabilizer

vertical(horizontal) boile

Please choose the right statment on cutting symbol“┏1” A: The cutting position is along the horizontal direction B: The projection direction is from the left to the right C: The number of "1" means the positioning axis ① D: The line width (thickness) of the symbol should be 1.4b

The horizontal or near horizontal part of a step is called( ). A: Slope B: Slope angle C: Working face D: Flat plate

Word中插入数学公式的方法是（）。 A: "插入"→"形状"→"公式" B: "开发工具"→"公式" C: "插入"→"公式"→"插入新公式" D: "引用"→"插入"→"公式"

The crankshaft is used to change the ____________ motion of the piston into __________ motion. A: reciprocating, rotary B: rotary, reciprocating C: vertical, horizontal D: horizontal, vertical

‌执行（）命令操作，元器件按水平中心线对齐‎‌‎ A: Center B: Distribute Horizontally C: Center Horizontal D: Horizontal

定义并初始化一个用于存放我们国家的四个直辖市的数组cityName，四个直辖市为：北京，上海，天津，重庆. 正确的是_________ A: String[] cityName=new String[4]{"北京","上海","天津","重庆"}; B: String[] cityName=new String[]{"北京","上海","天津","重庆"}; C: String[] cityName={"北京","上海","天津","重庆"}; D: String cityName = new String[4] { "北京", "上海", "天津", "重庆" };