未知题型
A test whose items are designed in different formats tends to have less validity and reliability than that is designed in a single format.
【参考答案】
测试的有效性和可靠性并不一定因为题目设计成不同的格式而降低。实际上，一个设计良好的多格式测试可以提高测试的有效性和可靠性......
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