Hailed as one of the 50 most important women in science, she found ways to study rare radioactive isotopes and advanced the ...

方差分析中的元和因素 试验中要考察的指标称为 试验指标 ，影响 试验指标的条件称为因素 ，因素所处的状态称为 水平 (通常用于3个或更多水平时；如果只有2个水平考虑 T-test);若试验中只有一个因素 改变则称为 单因素试验，若有两 ...

In the heart of Natick, Massachusetts, where history and hunger intersect, Casey’s Diner stands as a monument to culinary simplicity and breakfast perfection. You’ve driven past places like this a ...