风机()的使用寿命与空气中的含尘量有直接关系。
参考答案:转子
After you have done your homework ,____ sure there are mo careless mistakes before you hand it in .[ ]
A .try
B .do
C. make
D. take
有如下程序: #include<iostream) using namespace std; classBase{ public: Base(int x=0){cout<<x;} }; Class Derived:public Base{ public: Derived(int x=0){cout<<x;} private: Base Val; }; int main(){ Derived d(1); return 0; }
A.100
B.000
C.010
D.001