A-A+
Other health effects may show up either years
问题详情
Other health effects may show up either years after exposure has occurred or only after long or 4 periods of exposure.请帮忙给出正确答案和分析,谢谢!
参考答案
正确答案:
【解析】选[F]。空前的or表明此处应填一与long义相似的形容词。此句是说常年接触室内空气污染所造成的健康影响,[F]repeated(重复的,再三的)符合语义。