因这一类化合物大都呈()色,且具有()基团,故称黄酮。
煤层的顶板可分为¬哪几种?() 伪顶。 直接顶。 老顶。 泥岩顶。
Which is a restriction on a list partitioned table?() You cannot create global range partitioned indexes on the table. 。 The optimizer will not execute partition wise joins on the table’s partitions. 。 You must include at least one element in the value list of each partition of the table, even if that element is the keyword NULL. 。 Partition pruning will not occur during query optimizer if a range of values is included in the query predicate.。
给下列汉字注音并组词。允
“字体”、“段落”、“分栏”、“样式”都在()菜单中。
投标有效期应从()起算。