The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ).(A)4.(B)3√2.(C)2√5.(D)√17.

第1题

受压容器安全附件是:1.();2.();3.();4.();5.();6.();7.()

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第2题

黄药师的六个徒弟:1.()2.()3.()4.()5.武眠风6.冯默风

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第3题

publicclassreturnIt(2.returnTypemethodA(bytex,doubley)(3.return(short)x／y*2;4.)5.)WhatisthevalidreturnTypeformethodAinline2?()A.IntB.ByteC.LongD.ShortE.FloatF.Double

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第4题

单击一次窗体之后，下列程序代码的执行结果为______。 Private Sub Command1_ Click() Dim a As Integer, b As Integer, c As Integer a = 1: b = 2: c = 4 Print Value(a, b,C)End Sub Function Num(x As Integer, y As Integer, z As Integer) Num = x * x + y * y + z * z End Function Function Value(x As Integer, y As Integer, z As Integer) Value = Num(x, y, z) + 2 * x End FunctionA．21B．23C．19D．35

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第5题

以下程序的运行结果为:1. public class Conditional {2. public static void main(String args [] ) {3. int x = 4;4. System.out.println( "value is " ＋((x >4、? 99.99 : 9));5. }6. }A. 输出：value is 99.99B. 输出: value is 9C. 输出: value is 9.0D. 在第4行出现编译错误

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第6题

关于以下程序哪条叙述正确?1. int j = 2;2. switch ( j ) {3. case 2:4. System.out.println ("value is two");5. case 2 + 1:6. System.out.println ("value is three");7. break;8. default:9. System.out.println("value is " + j);10. break;11. }A. 第5行的表达式不合法;B. 变量j是可接受的，switch中表达式可以是byte, short, int,或long的任何类型;C. 输出为value is twoD. 输出是value is two 后跟value is threeE. 输出是value is two 后跟 value is 2

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第7题

曲线y＝X2+4在(0，4)处的法线方程为( )。A.y=0 B.y=4 C.x=0 D.x=4

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