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
参考答案：D
He felt doubtful about _______ the city. [ ]
A. to get around
B. get around
C. getting around
D. whether go or not
颗粒＜500μm的球形高氯酸铵
