找正时泵和电动机的垫片最好用()。
A.铁片
B.铝片
C.钢片
D.紫铜皮
参考答案:D
284. The officers led their men to _______ in battle, so all the villagers came out to award them with food and drink on both sides of the road.
A.victory
B.a triumph
C.failure
D.Defeat
29岁男性患者,左上前牙不慎撞断1天,冷热刺激痛,要求修复。
设计修复体龈缘的位置时不必考虑()
A.患牙的形态
B.修复体的固位
C.美观
D.患牙的牙周状况
E.咬合力的大小