对于破伤风病人，气管切开的主要指征是A．呼吸中枢麻痹 B．肺部感染 C．抽搐频繁，用 发布时间：2018-07-26 02:03 │ 来源：www.tikuol.com 题型：单项选择题 问题： 对于破伤风病人，气管切开的主要指征是A．呼吸中枢麻痹B．肺部感染C．抽搐频繁，用药不易控制D．吞咽困难，防食物误吸E．腹直肌强直，影响呼吸
题型：单项选择题 选出与图片相符的句子。( ) 1. A. My pen pal is from Canada. B. My pen pal is from America. ( ) 2. A. My brother likes swimming very much.B. My sister likes diving very much.( ) 3. A. My aunt is a teacher. B. My aunt is a doctor.( ) 4. A. He is my uncle. He likes playing computer games. B. He is my uncle. He likes singing after work. ( ) 5. A. My father reads newspapers after lunch. B. My father watches TV in the evening. 查看答案
题型：单项选择题 总质量为100kg的跳伞运动员从离地600m的直升机上跳下，经过2s拉开绳索开启降落伞，如图所示是跳伞过程中的v－t图，试根据图像求：（g取10m/s2）（1）t＝1s时运动员的加速度和所受阻力的大小。（2）估算14s内运动员下落的高度。（3）估算运动员从飞机上跳下到着地的总时间。 查看答案
