Polluted air is deleterious ______ human health. A: of B: to C: on D: for

中国大学MOOC: Effective reading of a scientific abstract involves identifying its structure. Though different disciplines and journals may show slight differences in their requirements for the format of abstracts, the major components of a scientific abstract remain almost the same and are presented in the same sequence. Read the following disordered statements and reorder them into a well-organized abstract. Explain the reasons for your arrangement of the statements.A. Participants first learned stimuli by either restudying or engaging in retrieval practice. Twenty-four hours later, we induced stress in half of the participants and assessed subsequent memory performance.B. We aimed to determine whether a highly effective learning technique could strengthen memory against the negative effects of stress.C. More than a decade of research has supported a robust consensus: Acute stress impairs memory retrieval.D. Participants who learned by restudying demonstrated the typical stress-related memory impairment, whereas those who learned by retrieval practice were immune to the deleterious effects of stress.E. These results suggest that the effects of stress on memory retrieval may be contingent on the strength of the memory representations themselves.F. To bolster memory, we used retrieval practice, or the act of taking practice tests.（请按照你的排序，直接输入大写字母，字母之间没有空格或标点符号）