Tachycardia may result from pain, apprehension, hypoventilation, or hypovolemia.心动过速可由于疼痛 、 恐惧 、 通气不足或低血容量引起.Methods: The animals achieved hypercapnic acidosis with mechanical hypoventilation before ischemia - reperfusio...
煤矿中天然存有高爆气体。Highly explosive gas is naturally found in coal mines.许多人到煤矿来,是因为契约规定必须服务几年.Many people came to the coal mineindentured for several years.煤矿工人须在地下工作.Coal miners have to work under the ground....