Which of the following best describes a frequency distribution A frequency distribution is a grouping of:（） A: data into intervals (classes) so that the number of observations in each of the non - overlapping intervals (classes) can be seen and tallied. B: selected data into intervals (classes) so that the number of observations in each of the non - overlapping intervals (classes) can be seen and tallied. C: dependent intervals (classes) so that they can be seen and tallied.

We have taken online classes of Calculus II for three weeks, are online classes right for you? Taking the classes online or in the classroom, which one do you prefer?

The basic view of object-oriented programming is that all systems are composed of ( ). A: classes B: objects C: functions D: methods

How is an object oriented relative to the image plane to create: a multiview? an axonometric pictorial?

当基于已有类创建子类的时候，已有类称为父类或基类，这个新类称为子类或派生类。When subclasses are created based on existing classes, existing classes are called parent classes or base classes, and this new class is called subclasses or derived classes.? 错误|正确