某工厂，三月比二月产量高20％，二月比一月产量高20％，则三月比一月高（ ）？
A．40％
B．44%
C．48%
D．52%
参考答案：B
---- What ______great fun it would be if we could light candles to celebrate his birthday!
---- Forget it! The teacher in _______charge of our dorm won’t be happy to see that.
A．/; /
B．/; the
C．a; the
D．a; /
若户内管装于管槽内，就应有适当的通风设施，且应以哪一种设施为第一选择。
A.自然通风设备
B.抽风机
C.强制换气装置
