骨质软化的X线表现为()
A.骨皮质变薄
B.骨小梁变细
C.骨轮廓增粗
D.关节间隙变窄
E.骨结构模糊
参考答案:A, B, D, E
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; }
蒸汽喷射泵安装时,被抽气管和蒸汽管的角度是()度。
A、60
B、90
C、180
D、30