一个等腰三角形的一个底角是42。，它的顶角是多少度？
180。-42。-42。=96。
His father feels like ________a walk after dinner while his mother would like ______TV at home.
A．taking; watching
B．to take; to watch
C．taking; to watch
D．to take; watching
按国标JJG140—91《铁路罐车容积检定规程》规定：“对装载油品的铁路罐车检定周期为（）年”。
A.3
B.5
C.6
D.4
