The main international payment item is()
A. International trade in goods and services
B. Capital flows
C. Government assistance
D. Wealth transfer
Which one of the following is not a way for plant cell to absorb water()
A. Diffusion
Bulk flow
C. Osmosis
D. Carrier-mediated transport
有关本周所学知识,下列说法正确的是()
A. new Cylinder().setCylinder(2.5,5,3.14);其中new Cylinder()就是匿名对象
B. 当一个.java源文件中,有多个类时,每个类都必须使用public进行修饰
C. 当成员变量与局部变量同名时,要在局部变量前面加this
D. 类具有封装性,所以类的成员变量和成员方法是不能被访问的
以下哪个是Student类创建对象的正确语句()
A. s1=new Student()
B. s1=Student()
C. Student s1=new Student()
D. Student s1=Student()