【单选题】从语音的社会性质的角度划分出来的最小的语音单位是 ( )
【单选题】单纯性肠梗阻与绞窄性肠梗阻的区别是()。
【单选题】She ______ and fell from the top of the stairs to the bottom.
【简答题】简单介绍五个课程中介绍的近代物理学成就。
【单选题】In an I–beam spar, the top and bottom of the I–beam are called the ______ and the vertical section is called the ______.
【单选题】Traditionally, Chinese are written ______ in columns going from top to bottom and ordered from right to left.