关于肱二头肌的描述,正确的是 ( )
A.起于肩胛骨的喙突和盂下结节
B.受桡神经支配
C.止于尺骨鹰嘴
D.能屈肩关节伸肘关节
E.以上都不是
参考答案:E
下列关于比色分析原理的说法中,不正确的是()。
A.液层厚度一定时,吸光度与待测物浓度成正比
B.用浓度和吸光度作曲线,其斜率决定于溶液的吸光系数
C.吸光系数随入射光强度改变而改变
D.液层厚度与吸光度成正比
E.吸光度与浓度成正比
When will the float-free emergency position indicating radio beacon be activated after abandoning ship?()
A.Immediately after floating free
B.After about one hour when the salt water activates the battery
C.Only when keyed by the radar of another vessel
D.Only when daylight activates the photovoltaic cell