【单选题】—It’s a long story, but you will find that there are few new words in it . —Good! it will be too hard for children.
【单选题】How do Americans shorten their long names?
A.
They use the first letters of the words instead of saying each word.
B.
They are told how to shorten them by authorities.
C.
They shorten long names as they like.
D.
Not mentioned in the article.
【单选题】X线胶片特性曲线是描绘曝光量与所产生的密度之间关系的一条曲线,由于这条曲线可以表示出感光材料的感光特性,所以称之为"特性曲线"。特性曲线的横坐标为曝光量,以对数值lgE表示;纵坐标为密度,以D表示。特性曲线由足部、直线部、肩部和反转部组成。足部密度的上升与曝光量不成正比,曝光量增加逐渐很多,密度只有较小的增加。直线部密度与曝光量的增加成正比,密度差保持一定,此时曲线沿一定的斜率直线上升。肩部密度随...
【单选题】线胶片特性曲线是描绘曝光量与所产生的密度之间关系的一条曲线,由于这条曲线可以表示出感光材料的感光特性,所以称之为"特性曲线"。特性曲线的横坐标为曝光量,以对数值lgE表示;纵坐标为密度,以D表示。特性曲线由足部、直线部、肩部和反转部组成。特性曲线可提供感光材、料的本底灰雾(D)、感光度(S)、对比度(γ)、最大密度(D)、宽容度(L)等参数,以表示感光材料的感光性能。
X线胶片特性曲线的直线部是...
【单选题】Speakers sometimes need to spell some words to help listeners to understand______.
【单选题】—It's a long story, but there are not any new words in it. —Good! _______ it will be hard for children. [ ]
【简答题】For a long time being happy was considered something that just happened, and there was nothing special about it. Now we know that getting along with other people is something that we can work at. It i...