对急性心肌梗死的诊断最有意义的检查是:()
A.心电图的病理性Q波
B.心电图表现ST段上抬
C.肌钙蛋白增高(定量测定)
D.CK增高
E.CK-MB增高
参考答案:C
Although he has lived with us for years, he_____ us much impression. [ ]
A. hadn't left
B. hadn't been left
C. hasn't been left
D. hasn't left
获得导游人员资格证()年内未从业,资格证自动失效。