【简答题】用参数R编程时,当圆弧___180°时,用+R表示圆弧半径。当圆弧 180°___时,用﹣R表示圆弧半径。
【简答题】Some learn by taking notes and charts and others learn by ______.
【单选题】Falls Company has budgeted sales of $120,000 based on 80,000 units. The margin of safety is $1,000. What is the break-even point in dollars?
【单选题】A company produces and sells a single product.Budgeted sales are $2.4million,budgeted fixed costs are $360,000 and the margin of safety is $400,000.What are budgeted variable costs?
【单选题】安装 Premiere Pro CC 需要多少位操作系统 ?
【简答题】已知大圆的半径为R,小圆的半径为r,圆环面积为S. (1)用代数式表示圆环的面积S; (2)当R=5,r=3时,求S(结果保留一位小数).
【简答题】电流所做的功,简称( ) ,用字母( ) 表示,单位是( ) ;电流在单位时间内所做的功,称为( ) ,用字母( ) 表示,单位是( ) 。