对象是一组相关变量和方法的封装体,对象的特征是对象的【 】、状态和身份。
参考答案:行为
解析:在这3个特征当中,对象的行为是最重要的一个,它由对象中的方法决定。
词汇。
1. I think someone here _____ (find) his book _____ (easy).
2. We have no classes on _____ (周末).
3. _____ ( 他最喜欢) fruit is apples and pears.
4. The two _____ (comedy)are very _____ (interest).
5. My friend's birthday is November _____ (twelve).
6. Her brother wants _____ (they) _____ (see)some _____ (documentary).
7. There are four _____ (China) in _____ (we) classroom.
8. I think Black September is a very_____ _____ (成功的恐怖片).
9. My English teacher thinks someone in our class reads sad, _____ (fun ), and _____ (excite) _____
(故事)
在下列四个方程中,X1、X2、X3和X4各代表某种粒子,以下判断中正确的是( )
+→++3X1,→+X2,→+X3,→+X4.
A.X1是α粒子
B.X2是质子
C.X3是中子
D.X4是电子