入站修作业场临修的典型故障,须在自典型故障发现之日起()日内反馈至发现的列检作业场。
A.2
B.3
C.4
D.5
参考答案:B
—Did you enjoy yourself last weekend, Tom?
—Yes, as you know, ______ birthday party went on in _____ most pleasant atmosphere.
A.the; the
B.a; the
C.the; a
D.a; a
轻集料一般用于防水混凝土。