题干
That hero who died in the war was so brave that he never ____ to the enemies until death.
A：gave u
B：gave out
C：gave i
D：gave away
答案(点此获取答案解析）
C
4NO＋6H2O，若反应速率分别用υ(NH3)、υ(O2)、υ(NO)、υ(H2O)(mol / (L·min)表示，则正确的关系是 ( )