答案:B
解析:
Option B is correct. Setting up the proportion x/147000=3600/9000 and solving for x will yield the expected number of dentists.
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答案:B
解析:
Option B is correct. Setting up the proportion x/147000=3600/9000 and solving for x will yield the expected number of dentists.
重点单词 | 查看全部解释 | |||
population | [.pɔpju'leiʃən] | 联想记忆 | ||
option | ['ɔpʃən] | 联想记忆 | ||
survey | [sə:'vei] | |||
proportion | [prə'pɔ:ʃən] | 联想记忆 | ||
yield | [ji:ld] | |||
setting | ['setiŋ] | |||
random | ['rændəm] |