蛙泳的换气的频率为（  ）

单项选择题病人,女,30岁。烧伤后出现急性肾衰竭,需紧急血液透析的指征是 A. 血钾大于6.5mmol L B. 血尿素氮16.5mmol L C. 血肌酐177.8mmolL D. 肾小球滤过率82ml (min 1.73m2) E. 尿量700ml d

单项选择题37. A German fertilizer described itself as earthworm friendly , and a British toilet paper ____ to be environmentally friendlier . A、demanded B、claimed C、accused D、applied