轴流式压气机的转速保持不变,气流在工作叶片进口处()的变化可以改变气流的攻角.
A.绝对速度
B.绝对温度
C.绝对压力
D.绝对湿度
参考答案:A
I was used to be the shyest person in the world. I often hide behind my mother whenever there came a visitor. When asking to speak in class, I could hard breathe. Then in the seven grade, I had a new English teacher, Miss Creen. One day, he asked me a question but I didn’t know the answer of it. I stood there, not knowing what to say. Learning that I was a shy person after class, she gave me some advices. She said, “Remember to smile after doing everything, and you’ll feel good about yourself.” Now I’m not a shy person. With smile, I can meet people without being afraid.
阳痿,面白神疲,夜尿多,形寒肢冷,舌淡脉弱,宜诊断为()。
A.肾气不固证
B.气不摄津证
C.肾阳虚证
D.脾虚气陷证
E.肾精亏虚证