患者,男性,29岁。右胸部外伤后,胸前壁出现反常呼吸运动,应首先考虑() ["损伤性血胸","损伤性气胸","损伤性血气胸","单根单处肋骨骨折","多根多处肋骨骨折"]
枯水期下闸挡水,洪水期开闸泄水,这个水闸可能是() ["节制闸","分洪闸","进水闸","挡潮闸"]
确保一块没有病毒的软盘不感染病毒,可采取措施有()。 ["不要把该软盘与其他磁盘放在一起","保持磁盘不粘灰尘","该软盘处于写保护口状态","定期对软盘格式化"]
氨苯砜治疗早期或增量过快可出现() ["麻风反应","剥脱性皮炎","肝损害","溶血性贫血","消化道出血"]
对综采工作面支架顶梁的规定有。() ["支架顶梁与顶板平行,不挤.不咬","支架顶梁最大仰府角<8°","相邻支架顶梁保持平整","相邻支架错茬不超过顶梁侧护板高的2\/3"]
简述根外营养的特点。