下列非霍奇金淋巴瘤预后最差的类型是
A．小淋巴细胞性
B．滤泡性小裂细胞为主
C．弥漫性小裂细胞性
D．弥漫性大细胞性
E．淋巴母细胞性淋巴瘤
参考答案：E
Could I do some explanations? I ________ to call on you yesterday, but someone came to see me just
when I was about to leave.[ ]
A. had intended
B. intended
C. would intend
D. was intending
患者，男性，26岁，因左下后牙反复肿痛就诊。临床检查：左下第二前磨牙面牙本质暴露，探诊（-），叩诊（+），X线片示根尖暗影，根尖孔呈喇叭口状。推测其可能的原因为（）
A.磨耗
B.创伤牙合
C.畸形中央尖
D.遗传性乳光牙本质
E.釉质发育不全
