(45) 是面向对象程序设计语言不同于其他语言的主要特点。是否建立了丰富的 (46) 是衡量一个面向对象程序设计语言成熟与否的一个重要标志。 (47) 是在类及子类之间自动地共享数据和方法的一种机制。

A．继承性

B．消息传递

C．多态性

D．封装性

After teaching the mother about tests performed to monitor the success of the infant’s treatment for congenital hypothyroidism, the nurse would determine that the teaching was effective when the mother states that the child will need frequent blood tests and regular assessment of which of the following

A. Blood electrolyte levels.
B. Metabolic rate.
C. Muscular coordination.
D. Bone ag