某仪表等级为1.0其满刻度相对误差为（）。
A.1.0%
B.-1.0%
C.±1.0%
D.±10%
参考答案：C
______ where to go, he asked a passer-by for help.
A．Having lost his way and didn’t know
B．Losing his way and didn’t know
C．Having lost his way and not knowing
D．Lost his way and didn’t know
胃静脉曲张常发生的部位是（）
A.体部
B.胃底部
C.贲门部
D.胃窦部
E.幽门部
