文档介绍：执业医师历年真题
of rural drinking water sources, protection of drinking water sources in rural areas by the end of theacilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
4．***体是指 D
、p羟丁酸、***
B．乙酰乙酸、p羟丁酸、***酸
C．乙酰乙酸、6氨基丁酸、***酸
、B羟丁酸、***
E．草酰乙酸、B羟丁酸、***酸
5。心肌兴奋性变化的特点是 B
B．有效不应期特别长
C．相对不应期短
E．低常期较长
6．突触前抑制是由于突触前膜 D
C。递质耗竭
E．产生抑制性突触后电位
7．下刿哪种成分不是粥样斑块内通常具有的B
Ⅲ染色阳性物质
C．纤维组织增生伴有透明变
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
E．无定形坏死物质
8．大动脉弹性降低 C
C．使收缩压升高，舒张压降低
，舒张压无影响
E。只使舒张压升高，收缩压无影响
9．影响神经纤维动作电位幅度的主要因素是 D
A．刺激强度
C．阈电位水平
、外的Na+浓度
E．神经纤维的直径
C
A．肝和肾
E．心和脑
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network pro