【单选题】以下关于一个点的应力状态的描述正确的是________。
D.
只知道点的位置,无法具体描述该点的总应力、正应力与切应力。
【单选题】观察下面的图片, 1 处所指的构造名称是( )。
【单选题】Nelson Mandela opened a black law firm in order to ____.
B.
help the poor black people with their problems
【单选题】In 1965, a new Voting Rights Bill became law, ________all black people had the right to vote from then on.
【单选题】The law of black-body radiation was given in 1900 by ( )?
【单选题】观察下面的图片,1处所指的构造名称是( )。【图片】
【单选题】The law that segregated the black people from the 1860s until 1960s was _____.
【判断题】道家提倡的“道”指的各种客观规律以及万事万物的周行不殆。
【单选题】Mr. Black, _____ born in Kentucky, lived and practiced law in Missouri.