Are these your scissors? Yes, ___________.[ ]
A. they are
B. it is
C. I am
答案：A
He argued _______ smoking, and insisted that it was ________ argument that smoking was harmful to health.
A．for; beyond
B．against; over
C．for; over
D．against; beyond
下列说法正确的是
A．可用两个样本均数t检验的资料，若用方差分析则效果更好
B．多个样本均数间的两两比较，可以将每两个样本分别比较作t检验
C．两组比较的F检验的F值和t检验的t值有以下关系：F=t2
D．多组均数比较用方差分析得出有差别后，只能用t检验作两两比较
E．方差分析只适合比较两个以上的均数的假设检验
