皮带电动机电压表的计量单位是()。
A.伏特
B.安培
C.欧姆
参考答案:A
胰腺癌患者,结合图像,正确的是()
A.不可切除
B.可切除
C.无恶性表现
D.正常
E.以上都不正确
()means a structured and documented system enabling company personal to implement effectively the company safety and environmental protection policy.
A.SMS
B.ISM
C.SOLAS
D.SMC