支托宽度为
A．磨牙颊舌径的1/2B．磨牙颊舌径的2/3C．前磨牙颊舌径的1/2D．前磨牙颊舌径的1/3E．尖牙颊舌径的2/3
参考答案：C
用所给的单词的适当形式填空。
1. I _____ (see) a car strike the tree last Sunday.
2. Everyone _____ (read) the book loudly.
3. We could all study about _____ (garden ) this winter.
4. I enjoyed _____ (Jenny) hobby best.
脱苯塔顶温度控制在（）。
A.70℃左右
B.80℃左右
C.90℃左右
