急性心肌梗死发生心脏破裂最常见的先兆是() A.呼吸困难 B.大汗 C.胸痛 D.晕 发布时间:2017-05-06 17:43 │ 来源:www.tikuol.com 题型:单项选择题 问题: 急性心肌梗死发生心脏破裂最常见的先兆是()A.呼吸困难B.大汗C.胸痛D.晕厥E.休克
题型:单项选择题 下列有关光现象的解释,正确的是( )A.小孔成像是因为光沿直线传播B.雨后彩虹是光的反射现象C.城市玻璃幕墙造成的“光污染”是光的折射现象D.电影屏幕制成白色是因为白色吸收各种色光 查看答案
题型:单项选择题 My sister was very afraid all the way because it was the first time she ______ a car. [ ]A. has driven B. drove C. had driven D. is driving 查看答案