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    【题目】VR can be used to practise skills in a(n) _____ environment that otherwise would be quite dangerous.

    A.virtualB.preciousC.academicD.secure

    【答案】D

    【解析】

    考查形容词辨析。A. virtual 虚拟的，实质上的；B. precious宝贵的；C. academic学术的，理论的；D. secure安全的。句意：VR可以用来在一个否则会非常危险的安全环境中练习技能。故选D。

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