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【判断题】
高速离心机的转头能超过其额定转速使用。A.
正确
B.
错误
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举一反三
【单选题】对于宝石透明度与加工等,下面说法错误的是()。
A.
宝石材料颜色深说明其内部致色元素对光吸收多，透过材料的光线少，透明度就低。
B.
直观透明度的简单测定三要素是光源、材料和人眼。
C.
透明宝石通常是共价键和离子键共存，因为很少有纯离子键或纯共价键。
D.
杂质元素以类质同象作用替换宝石组成成分时，宝石内部产生晶格缺陷，产生色心。
【单选题】Which of the following statements is true?（ ）
A.
The White Nile is the trunk of the River Nile
B.
The White Nile is the trunk of the Blue Nile
C.
The White Nile is a branch of the Blue Nile
D.
The White Nile is a branch of the River Nile
【单选题】The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in _____ while that for latter one is _____.
A.
sufficient quantity / measured
B.
measured quantity/sufficient
C.
excessive quantity/sufficient
D.
the less quantity the better/the more the better
【单选题】The passage indicates that which of the following is the primary value of the University of Iowa hearing test?
A.
It will reduce misdiagnoses of hard-to-test patients.
B.
It will lead to a cure for congenital deafness.
C.
It will eventually make other means of testing hearing obsolete.
D.
It will win Nobel Prize for outstanding achievement in the field of medicine.
【简答题】根据句意和提示完成句子。 1. The bakery is o the station. 2. The station is b the flower and the chemist. 3. Go a the road,turn left into East Street. 4. Which is the way to the c ? 5. The teacher put the broken c...
【多选题】下面关于[棋盘格]贴图的说法,哪些是错误的 _________。
A.
［棋盘格］贴图将两色的棋盘图案应用于材质。
B.
3ds Max默认［棋盘格］贴图是黑白方块图案。
C.
［棋盘格］贴图是 3D程序贴图。
D.
不可以使用［位图］替换［棋盘格］贴图中的颜色。
【简答题】The radius of the circle O is 2. The chord AB is equal to the chord CD. Both of the distance from the 2 chords to point O are 1. The area range of the quadrilateral ABCD is ___.(英汉小词典:radius半径;chord弦;...
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