--- Why don’t you try his phone number right now?   --- _______. I’ll try it.

A．All right

B．That’s all right

C．Yes, I did

D．It doesn’t matter

霍乱确诊条件必须依据

A．有腹泻，粪培养阳性或血清凝集试验，血清抗体测定效价呈4倍以上增长
B．粪涂片可见革兰阴性弧菌
C．粪涂片见鱼群样细菌
D．剧烈的腹泻，腹痛不明显
E．有与霍乱病人接触史，同时出现腹泻