【单选题】( 19 )下面有关数据库表和自由表的叙述中,错误的是
B.
)数据库表和自由表都支持表间联系和参照完整性
【单选题】My color television has given me nothing but a headache. I was able to buy it a little over a year ago because I had my relatives give me money for my birthday instead of a lot of clothes that wouldn’...
A.
ended all their programs
B.
provided fewer channels
C.
changed to commercials
D.
showed all-night movies
【单选题】下列有关数据库表和自由表的叙述中,错误的是( )。
【简答题】My color television has given me nothing but a headache.I was able to buy it a little over a year ago because I had my relatives give me money for my birthday instead of a lot of clothes that wouldn’t...
【简答题】题目写听材料,回答问题吧。 1.I had a (an) _________ day off. A. interesting B. relaxing C. boring 2. I had to study for _________ at home. A. the math competition B. the math test C. the English test 3. The gift...
【单选题】下面有关数据库表和自由表的叙述中,错误的是( )。
【单选题】安钠咖注射液处方如下 苯甲酸钠 1300g 咖啡因 1301g EDTA-2Na 2g 注射用水加至 10000ml其中,咖啡因与苯甲酸钠形成苯甲酸钠咖啡因,溶解度由1:50增大到1:1.2,其中苯甲酸钠的作用是( )。
【单选题】I had a day off, for I wasn't feeling well.
【单选题】I had a day______________, for I wasn't feeling well.