A、<img src="https://learning.mhtall.com/upload/uc_course/10154/CBC5FA70427E1EA452064F2DA64197E25E890E55.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/10154/50285AE0635F0055CFF97EE3F905DF72A23E26DF.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/10154/DD71254EF24AF15BD4A8838A0D5AB876E711EE87.png" alt="">