放置冠内附着体的基牙牙体预备成箱型，制备的空间应比附着体宽（

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问题单项选择题

放置冠内附着体的基牙牙体预备成箱型，制备的空间应比附着体宽（）

A.0.4mm

B.0.5mm

C.0.6mm

D.0.7mm

E.0.8mm

答案

参考答案：C

仿写题

例1: a watermelon	— What's this / that? — It's a watermelon.
1. a pear	— ____________________________? — ____________________________.
例2: a pencil	— Is this / that a pencil? — Yes, it is.
2. a bag	— ____________________________? — ____________________________.
例3: a strawberry / a peach	— Is this / that a strawberry? — No, it isn't. It's a peach.
3. an orange / a lemon	— ____________________________? — ____________________________.

填空题

（）（187—226），字子桓，曹操次子，三十四岁代汉自立。