By giving him electrical shock treatment, the doctor has______a partial cure of his short sightedness.

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问题 By giving him electrical shock treatment, the doctor has______a partial cure of his short sightedness.

选项 A、affected
B、effected
C、afforded
D、rendered

答案B

解析 effect"实现,达到……的目的";affect"影响";afford"负担得起";render"呈递,提供"。
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