【判断题】判断题:( )2、两转向轮偏转时,外轮转角比内轮转角大。
【单选题】The smallest repeating unit of a crystal lattice is called a_________.
【单选题】In a (an) dislocation, an extra plane of atoms is inserted into part of the crystal lattice
【判断题】Space lattice can be classfied into seven crystal systems, including 14 types of space lattice.
【单选题】研究者于第一年同时采集一至四年级儿童的注意力数据,并对这批儿童进行三年的追踪。这种研究方法是()。
【单选题】研究者于第一年同时采集一至四年级儿童的注意力数据,并对这批儿童进行三年的追踪。这种研究方法是()。
【判断题】Steel is an interstitial solid solution with impurity carbon atoms in iron crystal lattice
【多选题】测量直线度误差时,记录数据后可以用下面哪种方法求出直线度误差?
【简答题】______ crystal system has mutually perpendicular axes (α=β=γ=90°) but unequal lattice parameters, among which the z-intercept is larger than the x- or y- intercepts (c>a=b). A) Cubic B) Hexagonal C) M...