【多选题】请选择下列那些金融工具(金融产品)属于直接融资工具?
【单选题】It is common that people wear casual clothes on weekends in China.
【单选题】People will find this valley a beautiful place __________ they may spend their weekends.
【判断题】增压器工作叶轮的作用是将涡轮的机械能转换成为空气的动能和压能。()
【简答题】触电的伤害程度,决定于哪些因素? 2 、触电事故产生的原因有哪些?