单项选择题

银河系中一均匀球体天体, 其半径为R, 绕其对称轴自转的周期为T．由于引力凝聚作用, 其体积在不断收缩. 则一万年以后应有:

A．自转周期变大, 动能减小
B．自转周期变小, 动能增大
C．自转周期变小, 动能也变小
D．自转周期变大, 动能增大

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单项选择题

适用于体温表的杀菌方法是
A、煮沸法
B、间歇灭菌法
C、高压蒸汽灭菌法
D、70%酒精浸泡法
E、流通蒸汽消毒法

单项选择题

Talking about plagiarism and paraphrasing, which one in the following is NOT right?

A．Plagiarism means taking ideas from other sources, including them in your paper without giving credit to the original writers.
B．Paraphrasing is when you just take some information and you put it in your own words, which could not be plagiarism.
C．When you paraphrase, it is important for you to judge correctly whether or not that information needs a source.
D．When you paraphrase, it is important for you to judge correctly if such information is too general and common to indicate its source.