问答题Tom, this is Hack, Fred is ill in hospita -fred Oh,A.it' s sa B. it' s ba C.l' m sorry to hear tha D. that' s not goo
问答题试述矛盾的主要方面和次要方面关系的原理,并用这一原理说明怎样正确认识我国改革开放的形势。