连墙件在施工中不允许随意变更或拆除。（）

A client with a retinal detachment does not understand what happened to his eye and asks the nurse’s explanation. Which of the following would be the nurse’s best response to describe the pathology of retinal detachment

A. "The optic nerve is damaged when it is exposed to vitreous humor. "
B. "A tear in the retina permits the escape of vitreous humor from the eye. "
C. "The two layers of the retina separate, allowing fluid to enter between them. "
D. "Retinal injury produces inflammation and edema that increase intraoeular pressure. "

---What did you say to Julia? I saw her crying in the dormitory alone.

--- It ______ my fault. We talked happily when I was with her in the classroom.

A．mustn’t have been

B．should have been

C．shouldn’t have been

D．couldn’t have been

国家标准、行业标准、企业标准是基本一致的。( )

无罪证据

某同学在网上下载了一张风景画欲设为桌面墙纸，他应该在“显示属于”对话框中的“背景”选项卡中选择（）命令进行设置。

A.浏览

B.图案

C.编辑

D.设置