若有以下程序: #include<iostream> using namespace Std Class Base {public: Base() {x=0;} int x;}; class Derivedl:virtua1 public Base {public: Derived1() {x=10;}}; class Derived2:virtual1 public Base {public: Derived2()
A.
20
B.
30
C.
10
D.
0
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参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【单选题】Why are slow-speed diesel engines especially tall?
A.
Because in this way the piston can be withdrawn downwards.
B.
Because the engine can occupy larger space.
C.
Because the engine may have long strokes which improve engine efficiency.