下列程序的输出结果是 【11】 。
#include ＜iostream＞
using namespace std;
class Test
public:
Test() cnt++;
～Test() cnt--;
static int Count() (return cnt;
private:
static int cnt;
;
int Test::cnt=0;
int main()

cout＜＜Test::Count()＜＜’’;
Test t1, t2;
Test *pT3=new Test;
Test *pT4=new Test;
cout＜＜Test::Count()＜＜’’;
delete pT4;
delete pT3;
cout＜＜Test::Count()＜＜end 1;
return 0;

-----What’s the population_______the U.S.A.? 

----- the U.S.A.has _______population of 297 million.

A. of, a    B. of, /      C. in, a       D.in, /