管壁由黏膜、肌层和外膜组成() ["A.睾丸","B.附睾管","C.输精管","D.精囊","E.前列腺"]
五大发展理念蕴含着尊重规律、按规律办事的实践逻辑。遵循自然规律的可持续发展,在五大发展理念中表现为()。 ["绿色发展","协调发展","创新发展","共享发展"]
如炉膛负压超过-1000Pa时,引风机的入口挡板应()。 ["开大","关小","全开","关闭"]
关于视杆细胞在暗环境中的暗电流,正确的描述是() ["是静息电位形成的主要原因","由Na+<\/sup>跨外段膜内流而引起","由K+<\/sup>跨内段膜外流而引起","受控于胞质内cAMP浓度","增大时引发视杆细胞感受器电位"]
由黏膜腺、黏膜下腺和主腺组成() ["A.睾丸","B.附睾管","C.输精管","D.精囊","E.前列腺"]
麻醉床的评估