A technical manual or samples distributed free as exhibition. A: are B: is C: as D: have

A technical manual or samples______distributed free at the exhibition. A: is B: are

Duplicate samples can also be called（） A: Counter samples B: sealed samples C: confirmed samples D: reference samples

Counter samples can also be called （ ）. A: duplicate samples B: sealed samples C: confirmed samples D: reference sample

These samples are for you to choose _____.

In a test of the mean of a population, if the population variance is: A: known, a z- distributed test statistic is appropriate. B: known, a t- distributed test statistic is appropriate. C: unknown, a z -distributed test statistic is appropriate.

In the calculation of the bearing capacity of the normal section of a T-shaped reinforced concrete beam, it is assumed that ( ) within the effective width of the compressed flange. A: the compressive stress is uniformly distributed B: the compressive stress is distributed in a parabolic shape C: the compressive stress is distributed in a triangle shape D: the compressive stress is distributed partly uniformly and partly non-uniformly

Forrest Gump was distributed by ( ).in 1994.

Counter samples can also be called （）

The instructor distributed the test paper _____the students.