【单选题】Dear Tom, Thanks for your letter. Do you want to know about my evening? Well, I usually get home from work at 6 : 00 p. m. I make dinner for my family — my parents, my sister and my brother. After din...
【单选题】关系模型中,主键是( )。
C.
可由一个或多个其值能惟一标识该关系模式中任何元组的属性组成
【单选题】Dear Tom, Thanks for your letter. Do you want to know about my evening? Well, I usually get home from work at 6 : 00 p. m. I make dinner for my family — my parents, my sister and my brother. After din...
【简答题】磺胺类药物的代谢产物大部分是A. 1-氨基的乙酰化物 B. 4-氨基的乙酰化物 A. 苯环上羟基乙酰化物 B. D.杂环上的代谢物
【单选题】I know my brother well. Once he has made up his mind, nothing can change it, but instead I usually ____.
【单选题】Read the following passages and identify the problems in reasoning.I do not allow my dog to run around the neighborhood getting into trouble, so why shouldn’t I enforce an 8 o’clock curfew(宵禁)on my 16...
B.
Lack of representativeness.
【单选题】I know my job isn’t well paid, but ________ I don’t have to work long hours.
【单选题】若有说明 int a[10];则对a数组元素的不正确引用是
【单选题】—Do you know _____ does well in singing in your class? —My friend, I think. [ ]