We must ____ help those in need .
某氮的氧化物和一氧化碳在催化剂的作用下充分反应,生成氮气和二氧化碳.若测得氮气和二氧化碳的物质的量之比为1:2,则该氮的氧化物是( )
— What does your father think of your school report this term?
—The smile on his face shows that he is_______ with what I've done.