单选题 The sad truth is that ecosystems are ______ fragile and intensely complicated.
  • A. inherently
  • B. humbly
  • C. cautiously
  • D. industriously
【正确答案】 A
【答案解析】inherently：固有地，内部地，天生地；humbly：低姿态地，不起眼地，谦卑地；cautiously：谨慎地；industriously：勤奋地，辛苦地。