上颌全口义齿制作腭皱外形的作用主要是
A．增加义齿强度B．有利于固位C．有利于发音D．舒适E．美观
参考答案：C
根据句意，用括号内所给单词的适当形式填空。
1. Who knows the _____ names? (swim)
2. Cats like _____ fish. (eat)
3. I think the fruit shop is _____ now. It's too late. (open)
4. His father often watches football _____ on TV every Sunday. (match)
5. Our classroom is clean. What about _____ ? (they)
玻璃管量油时，量油高度误差不能超过±（）mm。
A、1
B、2
C、3
D、4
tches football _____ on TV every Sunday. (match)