【单选题】关于团体标准的说法,正确的是( )。
A.
在关键共性技术领域应当利用自主创新技术制定团体标准
B.
团体标准的技术要求不得高于强制性标准的相关技术要求
C.
团体标准由依法成立的社会团体协调相关市场主体共同制定
【单选题】根据《标准化法》关于团体标准的说法,正确的是
【简答题】The outbreak of the novel coronavirus has impacted China greatly. Now we are in a national battle against the fast spread of the epidemic. You and your family members are also part of this nation-wide...
【单选题】What did the American government do in the year 2009?
A.
It allowed the Native Americans to vote as a citizen.
B.
It apologized to all Native Peoples for the many instances of violence, maltreatment, and neglect it has done to them.
C.
It passed laws to stop the discrimination on the Native Americans.
D.
It announced that all men are created equal.
【简答题】求下列齐次线性方程组的一个基础解系,并写出它的通解。
【单选题】What did the citizen scientists find?
A.
One of Genghis Khan's homes.
B.
A structure built by Genghis Khan.
C.
A tomb older than Genghis Khan.
【单选题】下列关于青春期的发育、生理和心理特点的描述,不正确的是( )