27.1mol氦气（视为单原子分子理想气体），在温度由17℃升高到27℃的过程中保持压强不变，求气体吸收的热量、对外界做的功

Attheendoftheconference,allthe_(participate)wereaskedtofilloutaquestiolmaire

Theplantsneedsandwitha___(deep)ofatleast10to15cmtogrow.

The_(month)salaryforthepositionwillbenegotiableataround$2,000.

提高劳动职业技能是劳动者的义务