进行机组水汽取样时,水样温度应控制在()。
参考答案:25-35℃
This book is said to be a special one, which______ many events that cannot be found in other history books.
A.reads
B.writes
C.covers
D.prints
计算得t>t时可以认为()。
A.反复随机抽样时,发现这种大小差异的可能性大于0.01
B.这种差异由随机抽样误差所致的可能性小于0.01
C.接受H
D.拒绝H
E.拒绝H