【判断题】第一心音标志心室收缩开始,心室收缩力增强则第一心音加强。
【单选题】It was in the small house was built with stones by his father he spent his childhood.
【单选题】It was in the small house was destroyed by the flood he spent his childhood.
【简答题】直线y=2x-6与x轴交点坐标为______.
【单选题】It was in the small house ___ was built with stones by his father ___he spent his childhood .
【判断题】关于服装,远看看色彩,中距离看款式,再近则要看面料和缝制的细节
【判断题】实际气体在低温、高压的条件下最接近理想气体。( )
【简答题】直线y=3x-6与x轴的交点坐标为______.