问题
单项选择题
支托长度应为磨牙面近远中径的（）。
A.1/2
B.1/3
C.1/4
D.2/3
E.3/4
答案
参考答案：C
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支托长度应为磨牙面近远中径的（）。
A.1/2
B.1/3
C.1/4
D.2/3
E.3/4
参考答案：C
This is a photo a classroom. It’s a big room. In the photo, you can see a table, some . You can see a teacher and two students（学生）, . Three are on the table. A pencil case is on the desk. Two pens and two rulers are in pencil case. A schoolbag behind a chair. The lady(女士) is the Chinese teacher. Her name is . One student is Jack. He is 12. The other student is Mike. is 11. They are in Class 8. They’re good . math(数学) teacher is Mr. Brown. He is not here.
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