GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 3O4706A7G7UOYM2TX

In the design of medical experiments, the need for (i)____________ assignment of treatments to patients must be (ii)____________ the difficulty of persuading patients to participate in an experiment in which their treatment is decided by chance. A. competent B. reconciled with C. random D. emphasized by E. swift F. associated with