下列不能调整叶片频率的方法是()
A、在叶片顶部钻减负荷孔
B、加装拉金
C、减少激振力
参考答案:C
浅Ⅱ度和深Ⅱ度烧伤的共同特点是()。
A.都有疼痛和水疱
B.基底红,均匀,潮湿
C.都有血管栓塞征
D.都在2周左右愈合
E.都有瘢痕增生
In relation to employment law, state how the courts decide whether someone is self-employed or is an employee. (10 marks)