题目内容

Questions 11 to 18 are based on the passage you have just heard.

A. He was afraid he might be kept too late.
B. He would have something more important to do.
C. He was not in the mood to attend the excursion.
D. He had to make an appointment with a friend.

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男，60岁。右下第一磨牙因松动于三个月前拔除，要求修复。患者缺牙属( )

A. 肯氏第一类
B. 肯氏第二类
C. 肯氏第三类
D. 肯氏第四类
E. 肯氏第一类、第Ⅰ亚类

釉柱的直径平均为

A. 4～6μm
B. 2～3μm
C. 7～9μm
D. 0.5～1μm
E. 10μm

青少年牙周炎为( )

A. 牙龈类杆菌
B. 黏液性放线菌
C. 伴放线放线杆菌
D. 梭形杆菌
E. 中间型类杆菌

Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.

A. Once.
B. Twice.
C. Three times.
D. Never.