【单选题】In Britain today women __________ 44% of the workforce and nearly half the mothers with children are in paid work.
【单选题】物质与电磁辐射相互作用后,产生紫外一可见吸收光谱,这是由于( )
【单选题】物质与电磁辐射相互作用后,产生紫外一可见吸收光谱,这是由于()。
【单选题】知识点:时间的表达 3. 几个半小时: two and a half hours; two hours and a half. He's been a teacher for nearly ______________.