倒闸操作，对指令有疑问时应向调度询问清楚无误后执行。
参考答案：错
解析：原题中向调度询问清楚，应改为：向发令人询问清楚
A 35-year-old client is undergoing a brain computed tomography (CT) scan because of continued migraine headaches. He’s placed in the CT scanner and suddenly begins to complain of palpitations, sweating, shortness of breath, and shaking. The client is most likely experiencing
A. an allergic reaction.B. a myocardial infarction (MI).C. a panic attack.D. a hypoglycemic episod
天然饰板中常用的有（）。
A.大理石面板
B.花岗石饰面
C.预制水磨石
D.水刷石
E.釉面砖砖
