划线字注音、解释中有误的一项是( )
A:箪(dān古代盛饭用的圆筐)蹴(cù用脚践踏)
B:苟得(gǒu如果)不屑(xiè因轻视而不肯接受)
C:不辟(bì通“避”,躲避)勿丧(wù sàng不丢掉,不遗失)
D:羹(gēng煮或蒸成的汁状、糊状、冻状食品)奉(fèng侍奉,伺候)乡(xiàng通“向”,从前)
x2+ax+9是一个完全平方式,a的值是( )
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的算术平方根是____.