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【单选题】
下列不属于预防性矫治范畴的是A.
龋的早期治疗
B.
口腔不良习惯的早期破除
C.
乳牙早失的缺隙保持
D.
滞留乳牙的及时拔除
E.
早期严重拥挤牙列的序列拔牙治疗
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【单选题】下列有关几何公差标注方法的描述,正确的是( )。
A.
当被测要素为组成要素时，指引线的箭头应置于该被测要素的尺寸线的延长线上
B.
当被测要素为中心要素时，指引线的箭头应置于该被中心要素的轮廓上
C.
指引线箭头应指向几何公差带的长度方向
D.
当指引线的箭头指向圆形或圆柱形公差带的直径方向时，需要在公差值数字前加φ
【简答题】Of all the students of Grade Four, Bill is the tallest. He's thir, and of course, he's the oldest, too. But he's the worst and the most foolish( 愚蠢的 ). He can't answer the easiest questions in cla...
【简答题】Required: (iii) A firm of consultants has offered to undertake a study on behalf of Envico Ltd which will provide perfect information regarding seminar attendance during the forthcoming year. Advise t...
【单选题】When did the State Council publishe official guidelines to reform the Gaokao?
A.
2012
B.
2013
C.
2014
D.
2015
【简答题】Peter’s aunt comes to see his family and brings a kite to him.His mother gives it to h 小题1: after lunch. Peter w 小题2: to fiy it but his mother doesn’t let him d 小题3: so.“It’s time to go to school,”say...
【简答题】在几何公差标注时,当被测要素为轮廓线或轮廓面时,指引线箭头应指到该要素的轮廓线或其延长线上,并应与尺寸线明显( );当被测要素为中心线、中心面或中心点时,指引线箭头应与尺寸线( )。
【简答题】标注几何公差时,当被测要素为中心要素时,指引线的箭头应与尺寸线______;当被测要素为轮廓要素时,指引线的箭头应与尺寸线______;
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