提供产生牙齿矫治力的基础是()。
A.基牙
B.牙槽骨
C.口腔黏膜
D.支抗
E.矫治力
参考答案:D
She doesn’t plan her days. She watches TV ______ evening and changes channels ______ few minutes. So for her this summer just means another boring vocation.
A.in; every
B.every; every
C.every; each
D.every; in
对结构表面隐蔽的模板,在验算模板及其支架的刚度时,其最大变形值为为模板构件计算跨度的( )。
A.1/400 B.1/1000C.1/800 D.1/250