下面选项中不属于面向对象程序设计特征的是【 】
A.继承性
B.多态性
C.类比性
D.封装性
参考答案:C
解析:面向对象程序设计的3个主要特征是:封装性、继承性和多态性。
We were stuck at the airport because of the heavy fog, otherwise we ________ here in time for the conference.
A.arrived
B.had arrived
C.would arrive
D.would have arrived
使用灭火器扑救火灾时要对准()喷射。