“岁月既淹，袭以成弊”中“淹”的意思是（）
A.滞留
B.长久
C.淹没
D.埋没
E.流逝
参考答案：B
Look! The shop is _____. It _____ at eight o'clock every day.[ ]
A. closes, opens
B. closed, opens
C. closes, to opened
D. closed, is opened
H-1出口工艺气中加入水蒸气，目的是为了CO变换炉中CO变换率（）。
A.不变
B.变大
C.变小
D.易于调节
