The Mesozoic era is the age of "middle life" on Earth
举一反三
- The passage indicates that the Creiaceous period occurred（） A: in the early part of the Mesozoic era B: in the middle part of the Mesozoic era C: in the later part of the Mesozoic era D: after the Mesozoic era
- Which of the following life stage is not mentioned by the author? A: childhood B: old age C: middle age D: adolescence
- The earliest friction firing came out in ( ). A: early of paleolithic era B: middle of paleolithic era. C: middle of neolithic ear D: ealry of neolithic era E: late of neolithic era
- Life arose during the ( ). A: paleozoic B: mesozoic C: cenozoic D: cambrian E: precambrian
- Things went well for him during his early life but in middle age his ______ seemed to change. A: chance B: luck C: career D: opportunity