下列疾病中，可形成慢性抗原携带状态的是（）
A.麻疹
B.带状疱疹
C.流行性乙型脑炎
D.乙型肝炎
E.脊髓灰质炎
参考答案：D
下述哪种是原位癌
A．小肝癌B．胃黏膜内癌C．大肠黏膜下癌D．乳腺导管内癌
The doctors in ORBIS have done ______ an important job ______ the patients are all grateful to them.
A．too, to
B．so, that
C．such, that
D．as, as
