在方差分析中,检验统计量F是()。
A、组间平方和除以组内平方和
B、组间均方和除以组内均方
C、组间平方和除以总平方和
D、组内均方和除以组间均方
参考答案:B
根据句意,用括号内所给单词的正确形式填空。
1. This is Li Ming. He _____ (have) big hands.
2. I have two big _____ (foot).
3. —Does she _____ (have) a small mouth?
—Yes, she does.
4. Look! Her _____ (eye) are big.
5. My hair _____ (be) black (黑色的) and long.
钢筋混凝土圈梁的宽度宜与墙厚相同,当墙厚h大于240mm时,其宽度不宜小于()。
A.A
B.B
C.C
D.D