开沟器的主要类型有双圆盘式、单圆盘式、()、芯铧式()和()。
参考答案:锄铲式,滑刀式,靴鞋式
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; }