【单选题】当高聚物的相对分子质量足够大时,高聚物的黏流活化能随相对分子质量增大而( )。
【简答题】下列程序中声明了两个类AA和BB,其中函数“print”是类AA的成员函数,但是类BB的友元函数。 请在①、②和⑧处各填入正确的内容,使程序能正常运行。 include<iostream.h> 【 】; class AA{ int t; public: AA(int x){t=x;} void print(BB &b) ; }; class BB{ int s; public: BB(int y)...
【简答题】任务型阅读。 Dear Sir, As a middle school teacher and a mother of two children, I think your article on children and TV is very interesting. (1) However, my views on the subject are a bit difference from yo...
【单选题】下列代码的输出结果是________。 class AA{ protected void print( ){ System.out.println("AA"); } } class BB extends AA{ public void print( ){ System.out.println("BB"); } } class Test{ public static void main(String...
【判断题】Shift键与Capslock的状态无关。
【单选题】下面代码的输出结果是__________。 f=lambda x,y:x if x
【判断题】韦伯工业论认为运费决定生产成本,因而运费最低点就是生产成本的最低点。( )
【简答题】___________ customer satisfaction has become an essential marketing tool, particularly in areas where competition is fierce. It is well known that satisfied customers will stimulate new business by __...