注入防冻剂解堵后，管线内就有（），这需要及时用排水设施将其排除管外。
A.凝析水
B.凝析水和防冻剂
C.凝析油
D.污水污物
参考答案：B
— Would you like some more rice?
— No, thanks. _____. [ ]
A. Just a little
B. It doesn't matter
C. I'd love to
D. I've had enough
爸爸在过50岁生日时，弟弟说：“等我长到哥哥现在的年龄时，我和哥哥的年龄之和等于那时爸爸的年龄”，那么哥哥今年多少岁
A．18 B．20 C．25 D．28
