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问题 多项选择题

哪种方法能减轻桥体所承受的力（）

A.加深牙合面颊舌沟

B.扩大牙合面舌外展隙

C.加厚桥体金属层

D.牙合面的舌侧边缘嵴处添加副沟

E.减小桥体颊舌径宽度

答案

参考答案：A, B, D, E

单项选择题

We should let more young parents and their children can enjoy scientific early education .

A．provide more young parents and their children to enjoy early education

B．provide more young parents and their children to enjoy early education and scientific

C．provide young parents and their children enjoy more scientific early education

D．provide young parents and their children with more early education services
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单项选择题

对于足球比赛场地的叙述下列错误的是（）

A.比赛场地必须为长方形

B.比赛场地内各区域的面积可以根据情况变更

C.场地最短90米，最长120米

D.宽度最短45米，最长90米
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