患者50岁,左上腹痛,结合图像,最可能的诊断是()
A.无功能胰岛细胞瘤
B.胰腺腺癌
C.十二指肠癌
D.转移癌
E.以上都不是
参考答案:A
Don't _____ late, please. [ ]
A. are
B. be
C. is
D. are
脑膜炎奈瑟菌需要在二氧化碳环境中生长,其浓度为()
A.3%~7%
B.5%~10%
C.10%~15%
D.15%~20%
E.20%~25%