【单选题】Unit 1 News2.mp3 Question 5.Why have some US states increased cloud seeding in recent years?
A.
It can help cause ice to form and build up.
B.
It can help produce rain, snow falling to the ground.
C.
It can help meet a growing water demand.
D.
It can measure the effectiveness of processing.
【单选题】航空运费计算时,质量不足0.5千克的( )
【多选题】依据《建设工程监理范围和规模标准规定》,()必须实行监理。
【单选题】若类A和类B的定义如下: class A { int i,j; public: void get(); //... }; class B: A { int k; public: void make(int ); //... }; void B::make(int j) { k = i*j; } 则上述定义中,非法的表达式是( )。
【多选题】依据《建设工程监理范围和规模标准规定》,( )必须实行监理。
【单选题】若类 A 和类 B 的定义如下: class A{ int i,j; public: void get( ); //... }; class B:A{ int k; public: void make( ); //... }; class B::make( ) { K=i * j; } 则错误的地方是( )