Confidential testing for antibody to HIV should be offered to anyone requesting it, but only in conjunction with pretest and posttest counseling.

应向每一个请求者提供保密的HIV抗体检测，并与检测前后的咨询服务相结合。

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Then, it points out the whole procedure and the design of questions in the pretest and posttest.

随后详细描述了整个实验过程及前后测实验题目的设计。

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After training, all subjects received five posttest tasks: box task, transfer task, appearance-reality task, sources task and number conservation task.

训练后，被试接受5种后测任务：盒子任务、转移任务、外表-事实任务、来源任务和数量守恒任务。

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After training, all subjects received five posttest tasks: box task, transfer task, appearance-reality task, sources task and number conservation task.

训练后，被试接受5种后测任务：盒子任务、转移任务、外表-事实任务、来源任务和数量守恒任务。

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