在以下哪一种情况下，书面测试才具有效度？ In which of the following circumstances, a written test to be validity?
A.产生前后一致的结果 Produce consistent result
B.能够测试随机样本 Able to test random samples
C.能够测试所要测试的知识 Able to measure the knowledge want to be?
正确答案是C
在以下哪一种情况下，书面测试才具有效度？ In which of the following circumstances, a written test to be validity?
A.产生前后一致的结果 Produce consistent result
B.能够测试随机样本 Able to test random samples
C.能够测试所要测试的知识 Able to measure the knowledge want to be?
正确答案是C