题目内容
（请给出正确答案）
public class turnString
{
public static void main(String args[])
{
String s=”testonly”;
for(int i=s.length()-1;i＞=0;i--) System.out.print(s.charAt(i));
System.out.println();
}
}
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更多“public class turnString{public…”相关的问题
Public class Test
{
Public static void main(String args[])
{
System.out.println((3＞2)？4：5);
}
}
其运行结果是()
A、2
B、3
C、4
D、5
/****************** 文件shape.h*************************/
const float PI=3.14159f; // 定义圆周率常量
class Shape // 几何图形抽象类
{
public:
virtual float GetPerimeter()=0; // 纯虚函数，计算周长
virtual float GetAre()=0; // 纯虚函数，计算面积
};
class Rectangle: public Shape // 矩形类
{
public:
Rectangle (float len,float wid):length(len),width(wid){}
~Rectangle (){}
float GetPerimeter() {return 2*(length width);} // 计算矩形周长
float GetAre() {return length*width;} // 计算矩形面积
private:
float length, width; // 矩形的长和宽
};
class Circle: public Shape // 圆类
{
public: // 在下面编写每个成员函数
private:
float rad; // 圆的半径
};
class Square: public Rectangle // 正方形类
{
public:
Square(float len): Rectangle(len,len){}
~Square(){}
};
A.null
B.有错误，变量i没有初始化
C.1
D.0
A.Writeline(“a={0},b={1}”,a,b);}}的输出结果是（）
B.a=2,b=1
C.a=1,b=1
D.a=1,b=0
E.a=2,b=2
public class Class1
{
public static void main(String args[])
{
int n=6,sum=0;
for(int k=1;k＜=n;k++)
{
if (n%k==0)
sum+=k;
}
System.out.println(sum);
}
}
A.protected int ConstOver (){ }
B.private ConstOver (int z, int y, byte x) { }
C.public object ConstOver (int x, int y, int z) { }
D.public void ConstOver (byte x, byte y, byte z) { }
A.9
B.5
C.6
D.6.1
import java.io.*;
public class Test {
public static void main(String args[]) {
try {
String s = "ABCDE" byte b[]=s.getBytes()
FileOutputStream file =
new FileOutputStream("test.txt", true)
file.write(b) file.close() }
catch(IOException e) {
System.out.println(e.toString()) }
}
}
A、ABCABC
B、ABCDE
C、Test
D、ABCDEABCDEABCDE
When Bill de Blasio ran for New York City mayor last year, he promised to end a controversial （有争议的）, citywide cell-phone ban（禁令）in public schools, which is not equally enforced in all schools. Now, under his leadership, the city is preparing to end the ban. It will be replaced by a policy that allows phones inside schools but tells students to keep them packed away during class.
Many schools have a rule about enforcing the ban that says, “If we don't see it, we don't know about it.” That means teachers are OK with students bringing in cell phones, as long as they stay out of sight and inside bags and pockets.
But at the 88 city schools with metal detectors, die ban has been strictly enforced. The detectors were installed to keep weapon out of schools，but the scanners（扫描器）can also detect cell phones. So students at these schools must leave their phones at home or pay someone to store it for them.
The ban was put into place in 2007 under mayor Michael Bloomberg. Ending the ban will also likely end an industry that has sprung up near dozens of the schools that enforce the ban. Workers in vans（厢式货车）that resemble food tracks store teens' cell phones and Other devices for a dollar a day,
Critics of the ban say cell phones are important safety devices for kids during an emergency. They also say that enforcement of the ban is uneven and discriminatory. Where the ban is enforced, it puts a disadvantage on students who can't afford to pay to store their phones.
Before putting an official end to the cell-phone ban, city education officials are working on creating a new policy. It will include rules about not using the phones during class or to cheat on tests.
1. Which of the following is the main idea of the passage？
A. New York City will give financial aid to poor students.
B. New York City plans to restrict cell phone use in libraries.
C. New York City plans to install metal detectors in all public schools.
D. New York City will soon end a ban on cell phones in schools.
2. Students pay___________ a day to leave their cell phones in a van parked near their school.
A. a dollar
B. two dollars
C. five dollars
D. ten dollars
3. Metal detectors were installed in 88 city schools, mainly to keep ___________ out of schools.
A. cell phones
B. weapons
C. alcohol
D. drugs
4. The word discriminatory in Paragraph 5 probably means ___________.
A. necessary
B. tough
C. strict
D. unfair
5. According to the passage, which of the following statements is TRUE？
A. After the cell-phone ban is ended, students can use their phones during class.
B. The cell-phone ban is equally enforced in all public schools.
C. The cell-phone ban was put into place in 2008 under Mayor Bill de Blasio.
D. A phone-storage industry has appeared outside the 88 metal-detector campuses.
Some of the students in his class seem ______ to do their assignments.
A．boring
B．interesting
C．tiring
D．unwilling
