Let's ______ Beijing zoo with Lingling. [ ]

A. to visit

B. visits

C. visit

D. go

下列程序的运行结果是______。
class A implements Runnable

int a;
iht i = 2;
A(int x)

a = x;

public void run()

while(i ＞ 0)

System.out.println("线程" + a);
i--;



public class Testl3

public static void main(String[] args)

Thread a1 = new Thread(new A(1));
Thread a2 = new Thread(new A(2));
a1.start();
a2.start();

A．线程1
线程1
线程2
线程2

B．线程1
线程2

C．线程1
线程2
线程1
线程2

D．线程1
线程1
线程1
线程1