— What about Mary's idea?

— Very good! But not many people ________ the idea that money brings happiness.[    ]

A. subscribe to  

B. take to

C. contribute to  

D. relate to

飞机加油车灌油岛用的过滤/分离器的检查标准是（）。

A.铭牌清晰

B.闭路取样器清洁完好、无渗漏

C.压差计完好、无渗漏

D.以上都是