【单选题】小组正在开发一个电费计费系统,系统中包含上百万电费数据,调试时,发现执行查询时,每次返回所有数据,非常费时。最好的处理方法是( )。
【简答题】已知|x|=5,y=3,则x-y=______.
【判断题】对水箱盖施加规定压力后,此压力必须保持永久一定才正常。
【简答题】短歌行作者是谁,文学史上的“三曹”指的是哪三个人?“三苏”又指的是哪三个人?
【单选题】土的天然含水量,反映了土的干湿程度,按下式( )计算
【单选题】The statement "it is all too monkey"(Last line, Paragraph 1) implies that______
A.
monkeys are also outraged by slack rivals.
B.
resenting unfairness is also monkeys' nature.
C.
monkeys, like humans, tend to be jealous of each other.
D.
no animals other than monkeys can develop such emotions.
【简答题】When interest rates fall, the price of a callable bond will: A.rise more than an option-free bond. B.rise less than an option-free bond. C.fall less than an option-free bond.