单项选择题 A 19-year-old girl presents to the emergency department after a vehicle accident. The patient reports left shoulder pain that worsens with deep inspiration. Her blood pressure is 75/55 mmHg, pulse is 120/min, and respiratory rate is 24/min. On physical exam, there is abdominal guarding, abdominal tenderness in the left upper quadrant, and rebound tenderness. The patient’s mucous membranes are dry and skin turgor is reduced. Which of the following most likely represents the acute changes in renal plasma flow () and glomerular filtration rate () in this patient? ()

单项选择题 史湘云补写了海棠诗之后，又主动揽事，要求大家罚自己做个东道，先邀一社。大观园中为湘云的东道支援了螃蟹和好酒的人是 A、王熙凤 B、李纨 C、薛宝钗 D、贾探春

单项选择题 ( )是通过将经济指标分为领先指标，同步指标和滞后指标，并根据这三类指标之间的关系进行分析预测。 A、情景分析法 B、主观概率法 C、领先指标法 D、德尔菲法