颈内静脉穿刺常选择右侧的原因有
A.右侧较粗
B.右侧与无名静脉、上腔静脉几乎成直线
C.右侧胸膜顶低于左侧
D.胸导管位于左侧
E.右侧不易伤及动脉
参考答案:A, B, C, D
有关生物芯片的描述错误的是()。
A.常用的生物芯片分为三大类,即基因芯片、蛋白质芯片和芯片实验室
B.生物芯片的主要特点是高通量、微型化和自动化
C.生物芯片是近年来在生命科学领域中迅速发展起来的一项高新技术
D.生物芯片技术属于一种大规模集成电路技术
E.基因芯片可分为主动式芯片和被动式芯片
Signs and symptoms of retinal detachment include which of the following
A.Painless decrease in vision, a veil over the visual field, and flashing lights.
B.A veil over the visual field, increased intraocular pressure, and yellow-green halos around visual images.
C.Photophobia, yellow-green halos around visual images, and blurred vision.
D.Unilateral eye inflammation, a cloudy cornea, and a moderately dilated pupil.