题目: 每个日期/时间字段需要( )个字节的存储空间。A.1B.2C.4D.8 答案: 参考答案:D解析: 本题考查日期/时间数据类型的知识。日期/时间数据类型是用来存储日期、时间或日期时间组合的,每个日期/时间字段需要8个字节的存储空间。
题型:单项选择题 A very large company has twice as many male employees relative to female employees. If a random sample of four employees is selected, what is the probability that all four employees selected are female()A. 0.0625B. 0.0123C. 0.3333 查看答案
题型:单项选择题 A1/A2型题 符合革兰阴性杆菌肺炎临床特征的是 ()A.病理改变多为大叶性肺炎B.感染途径为吸入口咽部的定植菌C.并发症较少见,预后较好D.多见于青壮年E.可经母婴途径传播 查看答案