“randomized block”可以造什么句，randomized block造句

Single factor randomized block design was used in order to study chemical control effect of two new kinds of high efficiency herbicides Sumisoya and Harness on weeds in potatoes fields.

Methods Using EPQ(Eysenck Personality Questionnaire),DSQ(Defensive Style Questionnaire),541 students were selected by randomized block sampling and tested after enrollment.