干骺端是指()
A.成人长骨骨干两端较粗大的部分
B.小儿长骨未完成发育的两末端
C.成人长骨的两个骨端
D.成人长骨的远端
E.小儿长骨骨干两端较粗大的部分
参考答案:E
While he was at college,he took part in political activities,and was thrown into prison.
A.the;/
B./;the
C./;/
D.the;the
两样本均数比较的t检验,t,则正确结论是()
A.μ1=μ2
B.μ1≠μ2
C.两样本均数相同
D.样本均数间的差异有显著意义
E.现有的样本均数差异是由于抽样原因引起的可能性很小