基地人行道的纵坡不应大于8%，横坡宜为下列何值（）

A.1.5%～2.5% 

B.0.5%～1.5% 

C.1%～2% 

D.1%～2.5%

After using a CO₂ extinguisher on a ship，it should be（）.

A.put back in service if some CO₂ remains

B.hydrostatically tested

C.retagged

D.recharged