下列程序的输出结果是______。
#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()＜＜endl;
return 0;

糖原合成的关键酶是

A．葡萄糖激酶

B．醛缩酶

C．糖原合酶

D．UDPG焦磷酸化酶

E．磷酸葡萄糖异构酶