自然组织谐波的作用是() [" A.增加可视帧频","B.增加界面分辨力,清晰度及信噪比","C.增加高频超声的穿透深度","D.提高声输出功率","E.减少超声能量的衰减"]
何谓24小时母婴同室?
以下哪些为眼球光学系统() ["A.角膜","B.房水","C.瞳孔","D.晶状体","E.玻璃体"]
光线的屈折力取决于() ["A.两介质的折射率","B.光线入射的角度","C.光线折射的角度","D.光线在介质的吸收率","E.界面的曲率半径"]
男性淋病中下列哪一种类型较为少见() ["A.淋菌性尿道炎","B.附睾炎","C.淋菌性咽炎","D.淋菌性眼炎"]
产科制度改革后的新观念有些什么内窖?