脱苯塔顶温度提高会降低粗苯的什么?
参考答案:
脱苯塔顶温度提高会降低粗苯的质量。
Harry ______ his sister for coming late, and she ______ him though she was not happy. [ ]
A. apologized to; forgave
B. apologized ; excused
C. explained to; apologized
D. forgave; apoiogized
为了构造检验统计量,在方差分析中,需要计算()
A、总离差平方和SST
B、误差项离差平方和SSE
C、水平项离差平方和SSA
D、组间方差MSA
E、组内方差MSE