面向对象分析与设计技术中，______是类的一个实例。

面向对象分析与设计技术中，（ ）是类的一个实例。

● 面向对象分析与设计技术中，（18）是类的一个实例。（18）

● 面向对象分析与设计中， （3） 是类的一个实例。（3）

Project（71）is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

● Project（71）is an uncertain event or condition that, if it occurs, has a positive or a negative effect on at least one project objective, such as time, cost, scope, or quality.（71）

已知f1(int)是类A的公有成员函数，p是指向成员函数f1()的指针，采用赋值，( )是正确的。

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

有以下程序： int f1(doubleA){return a*a;} int f2(int x,int y) {double a,b; a=f1(x); b=f1(y); return a+b; } main() {double w; w=f2(2.1,4.0); } 程序执行后，变量w的值是( )。

A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.

F1系列PLC—OR指令表示（）。