心肌梗死最早出现的最突出的症状是：（）
A.胃肠道症状
B.胸痛
C.心律失常
D.心源性休克
E.心力衰竭
参考答案：B
It’s clear that people with ________ opinions may do things ________.
A．different; differently
B．difference; different
C．different; difference
D．differently; different
证据标准
