【B19】
A. hurriedly
B. repeatedly
C. worriedly
D. surprisedly
企业无法可靠区分研究阶段和开发阶段支出的,应将其所发生的研发支出全部资产化计入无形资产成本。()
A. 正确
B. 错误
The weight of a newborn has to do with the supply of oxygen even when he was still in his
A. Right
B. Wrong
C. Not mentioned
有关系S(S#,SNAME,SEX,AGE),查找年龄大于20岁的学生的姓名和年龄,如下的关系代数表达式正确的是(其中π为投影操作符,σ为选择操作符)
Ⅰ.πSNAME,AGE(σAGE>20(S))
Ⅱ.σAGE>20(πSNAME,AGE(S))
A. 只有Ⅰ正确
B. 只有Ⅱ正确
C. 都正确
D. 都不正确