当x=10时,6x-4x>20.______.(判断对错)
当x=10时
6x-4x=2x=2×10=20,
因为6x-4x=20,所以6x-4x>20是错误的.
故答案为:×.
甲型肝炎患者,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
--Tibet, a part of China can not suddenly become its own country.
--_______. All the Chinese people are against it
A.Yes, it can
B.Yes, it can’t
C.No, it can
D.Certainly not