已知多边形的每一个外角都是72°,则该多边形的内角和是[ ]
A.700°
B.720°
C.540°
D.1080°
答案:C
丙型肝炎患者,血清学检查表现为
A.anti-HEV阳性B.抗核抗体(ANA)阳性C.anti-HCV陌性D.HBsAg阳性E.anti-HAV IgM阳性
A: If you like, I can help you paint the room tomorrow. B: ().
A. Thanks a lot. But I think I can manage it myself.
B. No. Don’t worry about that.
C. I don’t like it. Thanks anyway.
D. I’m sorry. That’s not necessary.