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【简答题】
翻译: In recent years, more and more cities in China have begun to build subways. The development of subways can help reduce traffic congestion and air pollution in cities. The subway has the advantages of safety, speed and comfort. More and more people choose the subway as the main means of transportation to work or school every day. Nowadays, it is becoming more and more convenient to take the subway in China. In some cities, passengers can use a card or a mobile phone to take the subway. Many local elderly citizens can also take the subway for free.
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【单选题】阅读下列程序: public class Threadiest{ public static void main(String args[{ PrintWords p = new PrintWords(); Thread t = new Thread( p ); t.start(); p.run(2); } } class PrintWords implements Runnable{ int i...
A.
I,II
B.
III,IV
C.
I,II,III,IV
D.
包含I,II,III,IV，顺序有多种，但一定是I在II的前面，IV在III的前面
【简答题】请将下列程序补充完整,使其运行结果是在屏幕上输出字符串 "Hello, world." #include int main() { return 0; }
【简答题】下列字符串操作的运行结果是( )。 x="hello" print(x[::-1])
【单选题】下列代码运行的结果的是 String str1="hello"; String str2="he"+new String("llo"); System.out.println(str1==str2);
A.
true
B.
false
C.
比较字符串应该用equals()方法
D.
代码有语法错误
【单选题】下列程序的运行结果是: str = "Hello" print(str * 2) # 输出字符串两次 print(str + "Python!") # 连接字符串
A.
HelloHello HelloPython!
B.
Hello2 Hello Python!
C.
HelloHello Hello Python!
D.
Hello*2 HelloPython!
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