Suppose your cousin Li Ming has just been admitted to a university. Write him/her a letter to1)congratulate him/her, and2)give him/her suggestions on how to get prepared for university life You should write about 100 words on ANSWER SHEET 2.Do not sign your own name at the end of the letter. Use "Zhang Wei" instead. Do not write the address.
静脉注射肾上腺素后不出现下列哪项生理效应
A. 心肌收缩加强
B. 心率增快
C. 组织液生成减少
D. 内脏和皮肤血管收缩
在肾素-血管紧张素系统中,缩血管作用最强的物质是
A. 肾素
B. 血管紧张素Ⅰ
C. 血管紧张素Ⅱ
D. 血管紧张素Ⅲ
交感缩血管纤维分布密度最大的血管是
A. 微动脉
B. 毛细血管前括约肌
C. 后微动脉
D. 毛细血管