one hour and a half作主语谓语是单数还是复数?one and a half hours呢?

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onehourandahalf作主语谓语是单数还是复数?oneandahalfhours呢?onehourandahalf作主语谓语是单数还是复数?oneandahalfhours呢?onehoura

one hour and a half作主语谓语是单数还是复数?one and a half hours呢?
one hour and a half作主语谓语是单数还是复数?one and a half hours呢?

one hour and a half作主语谓语是单数还是复数?one and a half hours呢?
one hour and a half 单数
one and a half hours复数

one hour and a half=one and a half hours都用复数