以下物理量中,属于标量的是( )
A.线速度
B.位移
C.路程
D.向心加速度
答案:C
题目分析:标量只有大小,没有方向,所以答案为C
点评:此类题型考察了关于标量和矢量的区别
继电保护人员参与现场事故调查,哪些做法是正确的()
A.不违规指挥现场一二次设备操作
B.监督现场做好运行设备的安全措施
C.监督现场编制试验项目,制定二次安全措施
D.必要时停用运行设备保护装置
A client is admitted to the hospital in the manic phase of bipolar disorder. When placing a diet order for the client, which foods would be most appropriate()
A. A bowl of soup, crackers, and a dish of peaches.
B. A cheese sandwich, carrot sticks, fresh grapes, and cookies.
C. Roast chicken, mashed potatoes, and peas.
D. A tuna sandwich, an apple, and a dish of ice cream.