单项选择题
A. prescribing the medication needs the identified criteria B. the absence of the practitioners is a serious obstacle C. the presence of more practitioners is a new problem D. identifying the practitioner is of great importance
A. there was a long interval between cause and effect B. the weather was difficult for us to forecast C. weather forecasts were inaccurate D. ecologists didn’t exist until modem times
A.watch B.see C.catch D.kill