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【单选题】
有关维生素A的叙述错误的是:A.
维生素A缺乏可引起夜盲症
B.
维生素A是水溶性维生素
C.
维生素A可由β-胡萝卜素转变而来
D.
维生素A有两种形式,即A1和A2
E.
维生素A参与视紫红质的形成
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反馈参考答案：
举一反三
【单选题】运行下面程序的结果是什么？abstract class MineBase {abstract void amethod();static int i;}public class Mine extends MineBase {public static void main(String[] a) {int[] ar = new int[5];for (int i=0; i
A.
打印 5 个 0
B.
编译错误，数组 ar[] 必须初始化
C.
编译错误， Mine 应声明为抽象类
D.
出现 IndexOutOfBoundsException 异常
【单选题】下面程序运行的结果是( ) abstract class A { abstract int getinfo(); } public class B extends A { private int a = 0; public int getinfo() { return a; } public static void main(String args[]) { B b = new B()...
A.
输出结果为0
B.
通过编译但没有输出任何结果
C.
第5行不能通过编译
D.
第2行不能通过编译
【单选题】It has been repeatedly shown in hospitalized patients that patients fed earlier in their course of treatment:
A.
experienced less weight loss than those patients fed later
B.
had shorter length of hospital stay than patients fed later
C.
had higher hospital costs due to nutrition therapy than patients fed later
D.
a and b
E.
a and c
【单选题】听力原文： The outgoing parliament in the Palestinian territories has voted to give new powers to the President Mohammed Abbas. The move has been met with anger from the militant group Hames which won the ...
A.
Fatah Party intended to irritate the militant group Hamas.
B.
Fatah Party wanted to strengthen the legislative power.
C.
Fatah Party was defeated in the Palestinian election.
D.
Fatah Party suffered a stunning defeat in the constitutional court.
【单选题】下面程序运行的结果是public abstract class A { public A() { Console.WriteLine('A'); } public virtual void Fun() { Console.WriteLine("A.Fun()"); } } public class B : A { public B() { Console.WriteLine('B'); } pu...
A.
A.Fun()
B.
B.Fun()
C.
A B A.Fun()
D.
A B B.Fun()
【单选题】下面程序运行结果是 abstract class BaseClass { public virtual void MethodA() { Console.WriteLine("BaseClass"); } public virtual void MethodB() { } } class Class1 : BaseClass { new public void MethodA() { Conso...
A.
BaseClass
B.
Class1
C.
BaseClass Class1
D.
Class1 BaseClass
【单选题】下面程序运行的结果是?() abstract class AbstrtIt{ abstract float getFloat(); } public class AbstrcTest extends AbstactIt{ private float f1=1.0f; private float getFloat(){ return f1; } }
A.
编译成功
B.
在第6行产生一个运行时异常
C.
在第6行产生一个编译错误
D.
在第2行产生一个编译错误
【简答题】下面程序运行的结果是 public abstract class A { public A() { Console.WriteLine('A'); } public virtual void Fun() { Console.WriteLine("A.Fun()"); } } public class B : A { public B() { Console.WriteLine('B'); } pu...
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【单选题】运行下面程序的结果是什么？abstract class MineBase {abstract void amethod();static int i;}public class Mine extends MineBase {public static void main(String[] a) {int[] ar = new int[5];for (int i=0; i
A.
打印 5 个 0
B.
编译错误，数组 ar[] 必须初始化
C.
编译错误， Mine 应声明为抽象类
D.
出现 IndexOutOfBoundsException 异常
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