环R与环S同构，则R、S在代数性质上完全一致。（）
A. 对
B. 错
Whatkindoftopicsaregoodtopics?
A. Topicthatismeaningfultonotonlyyourself,butmorepeople-peopleofdifferentages,genders,majorsandcultures.
B. Topicrelatedtopeople’swellbeings.
C. Topicthattheaudiencedon'tknowmuchabout.
D. Topicthatmayinterestyouraudience.
Whicharethewaystoorganizeandanalysethematerialseffectively?
A. Readefficiently.
B. Keepaspeechmaterialfile.
C. Knowwhentostop.
D. Synthesizetheinformationyouhavefoundinmultiplesources.
“黄河”钢琴协奏曲取材于抗日战争时期的救亡歌曲《黄河大合唱》。
A. 对
B. 错
微信支付 
支付宝支付