单项选择题 听力原文：M: How long have you been working in the laboratory?W: For almost three years, ever since I got my degree.M: Your bachelor's?W: No, my master's. I didn't try to get a job until I had my master's degree.M: What kind of research do you do? Are you trying to develop new products or something like that?W: No, that's clone by another group in the lab. The group I'm with is doing basic research.How long have the woman been working in the lab?A．Four years.B．Just three years.C．Almost three years.

单项选择题 设抛物线y2=8x的焦点为F，点P在此抛物线上且横坐标为2，则|PF|等于（）

单项选择题 男性，32岁，暴饮暴食2h后发生上腹部剧烈疼痛.并向腰背部放射，伴恶心呕吐，呕吐物为胃内容物，吐后腹痛不缓解。8h后就诊于急诊室最有助于诊断的检查是（ ）A．血常规B．血淀粉酶C．尿淀粉酶D．心电图E．腹平片