冬季防喷管线试压后,采用什么办法把里边的水或钻井液清除干净?
参考答案:
在井口与节流管汇之间焊一个高压丝堵,试压后用气进行扫线,如有热风吹,扫线效果会更好。
We, Chinese , compare China ___ our mother.
A.with B, to C. by D. into
有如下程序: #include<lostreanl> using namespace std; elass MyClass public: MyClass( )++count; ~MyClass( )--count; static int getCount( )return count; private: static int count; ; int MyClass::count=0; int main( ) MyClass obj; cout<<obj.getCount( ); MyClass*ptr=new MyClass; cout<<MyClass::getCount( ); delete ptr; cout<<MyCiass::getCount( ); return 0; 程序的输出结果是
A) 121 B) 232 C) 221 D) 122