one half degree 的意思是0.5度呢还是1.5度?

one half degree 的意思是0.5度呢还是1.5度? 一天半 的英文是one and a half days还是one and half days 那1.5 是one and 英语翻译one-half 是0.5的意思吗？那0.6怎么说呢？6.6% 用英语怎么表达？ half的用法是 one and a half years 还是one and a half year?half具体的用 零度是zero degree还是zero degrees?那1度呢?要不要加S? 一度怎么说 是one degree 还是one degrees 是one and half hours还是one and half hour? one hour and a half作主语谓语是单数还是复数?one and a half hours呢? 1.5和0.5摄氏度后面的degree是否加s one point five degree(s) centigrade? one half与one-half 是一个意思吗 Tt's one degree.(划线部分在one degree).是用what 还是how half past one的中文意思是什么?