do you know what this sign ()填means可以吗?还是mean

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doyouknowwhatthissign()填means可以吗?还是meandoyouknowwhatthissign()填means可以吗?还是meandoyouknowwhatthissign(

do you know what this sign ()填means可以吗?还是mean
do you know what this sign ()填means可以吗?还是mean

do you know what this sign ()填means可以吗?还是mean
这里是个宾语从句的疑问句
从句的单复数一般跟从句的主语一致
从句的主语是this sign 所以用单数means

means