冷底子油是使各类防水材料与基层更好的粘结的冷用油粘结剂，是用汽油或其他易挥发的油类与（）配制而成。
参考答案：沥青
Which of the following underlined parts is different in pronunciation from others?
A．We know that cormorants are large black birds.
B．The man wants to teach his son everything he knows.
C．His trips often begin in the late afternoon.
D．The old man likes to catch the fish with his friends at weekends.
