【简答题】聚类分析分为 Q 型聚类和 R 型聚类, 其中 Q 型聚类是对 进行聚类, R 型聚类是对 进行聚类。
【单选题】The Columbia has finished the task in the International Space Station and is reported to come back to the earth tomorrow, or to be more _____ , at 3:32p.m. local time.
【单选题】下面关于立体化学问题的说法,正确的是:
A.
分子中具有一个手性碳的化合物,如果手性碳是 R 构型的,则化合物一定是右旋。
D.
一对对映体,如果其中一个是右旋的,则另一个一定是左旋的。
【判断题】材料的孔隙率越大,则其吸水率也越大。( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】听力原文:M: The winter does come today, I think. W: Sure it does. It is reported that the temperature goes below 15 degree. And my fingers got totally numb. What shall I do with them? Q: What is the woman...
A.
She will listen to the weather report.
B.
She will light the furnace.
C.
She will turn on the lights.
【判断题】我国现行税法规定,个人所得税起征点为 3500 元。
【单选题】It is reported that most of the people who are drugs used to be wealthy.
【单选题】在市场调研过程中,对变量的分类被称为( )。