当装岩机使用中发生故障时，必须立即停车，不用切断电源就可以处理故障。
参考答案：错
请简述课件设计中以学习者为中心原则的含义？
A client is brought to the hospital after vomiting bright red blood and is admitted through the emergency department with a diagnosis of bleeding duodenal ulcer. While the client is bleeding, it will be essential for the nurse to assess frequently for signs of early shock. Which one of the following is an important indicator of early shock（）
A. Tachycardia.
B. Dry, flushed skin.
C. Increased urine output.
D. Loss of consciousness.
