【简答题】下列关于0racle数据库物理存储的叙述中,不正确的是( )。 A)存储空间大小的选择是以段为单位 B)一个段是一组分配了特定数据结构的盘区 C)盘区是特定数量的连续数据块 D)对于一张给定的表,数据可能存放在数据段中,而索引可能存放在索引段中
【单选题】听力原文:W: My sister is coming this weekend and I thought the three of us could go out to dinner Saturday night. Any suggestions? M: It's up to you. I don't know the restaurants around here that well. So...
A.
The woman should decide where to eat Saturday.
B.
He already has plans for Saturday night.
C.
The woman should ask her sister for a suggestion.
D.
He will make a reservation at the restaurant.
【单选题】定时限过电流保护装置的动作时间级差一般取为( )。
【单选题】血浆 pH 值主要 取决 于 下列 哪 对 缓冲 物质 ( )
D.
Na 2 HPO 4 /NaH 2 PO 4
【单选题】反时限过电流保护动作时限的整定时,为满足选择性的要求,前后两级保护装置的动作时限级差△t一般取多少秒?
【单选题】定时限过电流保护动作时限的整定时,为满足选择性的要求,前后两级保护装置的动作时限级差△t一般取多少秒?
【简答题】用所给词的正确形式填空。 Gold is ___(little) useful than iron. My sister is two years ___(old) than I. Mary's parents have three daughters, and she is the ___(young)child. The ___(cheap) bags are not usually the ...
【单选题】My brother likes to talk,but my sister__________ So she is_______ than him