题目内容

平滑面龋的病损形态是

A. 烧瓶状，口大底小
B. 烧瓶状，口小底大
C. 三角形，底位于釉质表面
D. 三角形，底位于釉牙本质界（窝沟龋）
E. 浅碟状，口大底浅

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釉质龋暗层的孔隙容积占釉质体积的

A. 0.1%
B. 1%
C. 2~4%
D. 5%
E. 25%

Listen to the following dialogue and answer the questions that follow. How many people were involved in the conversation?____________ people. (空格处请填入英文数字, 并注意句首字母大小写的要求。)

Listen to the following dialogue and answer the questions that follow. What is the most probable relationship between the speakers: teacher and student, doctor and patient or just friends? ______________.

Among the stop consonants, /p/, /t/ and /k/ are the voiced sounds with the vibrating of the vocal cords.

A. 对
B. 错