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三、单项填空。 ( )1.The earth a planet and it around the sun. A.are;go B.was;went C.is;go D.is;goes ( )2.There has been life the earth for hundreds of millions of years. A. in B.on C.of D.at ( )3.He promised to pick me up at the school gate. However, he yet. A.didn ’ t arrive B.doesn ’ t arrive C.isn ’ t arriving D.hasn ’ t arrived ( )4. — Why has no one communicated us? — We don ’ t know the answers yet. A. with B.to C.for D.at ( )5.It is said that the disease has killed more than people in the world. A.hundreds of B.two hundreds ’ C.hundred of D.two hundred ( )6. Chinese are looking for ways to learn English well. A.Thousand B.Thousands C.Thousand of D.Thousands of ( )7.This movie wasn ’ t .He fell asleep half way when seeing it. A.interesting enough B.enough interesting C.interested enough D.enough interested ( )8.When I the station yesterday afternoon, some passengers were getting on the train. A. reached B.arrived C.got D.went ( )9. — How heavily it rained this early morning! — Yes.But of the students in our class was late for school. A.some B.none C.all D.neither ( )10. — Why do you always sleep ? — Because I ’ m afraid of the dark. A.by yourself B.with the door open C.with the window open D.with the light on
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【单选题】某镜架镜腿内侧标有52-16-140,则可判定该镜架的尺寸是用( )测得的。
A.
基准线法
B.
方框法
C.
国际标记法
D.
轴向标记法
【单选题】碳钢在冶炼时带入的常存杂质元素中,对钢的性能和质量影响较大,应严格控制的有害元素是磷和( )。 答案
A.
B.
C.
【简答题】已知镜架56□14—140,求镜架的中心水平距是多少?
【简答题】计算下列镜架的几何中心距? 镜架规格尺寸:52□16-135 镜架规格尺寸:56-14-140
【单选题】某患者选配一副规格为52□18-140的镜架,其140mm代表( )
A.
镜圈尺寸
B.
鼻梁尺寸
C.
镜腿尺寸
D.
瞳距
【简答题】已知镜架54□16—140,瞳距为62mm,求水平移心量是多少?
【单选题】镜架54-16-140,高36mm,RPD=31mm,瞳高23mm,则移心量是()mm。
A.
外移4,上移5
B.
内移4,上移4
C.
内移5,上移4
D.
内移4,上移5
【单选题】碳钢在冶炼时带入的常存杂质元素中,对钢的性能和质量影响较大,应严格控制的有害元素是磷和( )。
A.
B.
C.
【单选题】碳钢在冶炼时带入的常存杂质元素中,对钢的性能和质量影响较大,应严格控制的有害元素是磷和( )。
A.
B.
C.
D.
【多选题】碳钢在冶炼时带入的常存杂质元素中,对钢的性能和质量影响较大,应严格控制的有害元素是( ) 。
A.
B.
C.
c. 硫
D.
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