在建立唯一索引,出现重复字段时,只存储重复出现的记录的( )。
A.第一个
B.最后一个
C.全部
D.几个
参考答案:A
根据句意及首字母提示,完成下列单词拼写。
1. They are waiting for you at the bus s_________.
2. Beijing is in the n_________of China.
3. I often get up at h_________ past six in the morning.
4. There are s_________minutes in an hour.
5. It's about two k_________from here to there.
6. A small n_________of students take cars to school.
7. Traveling by a_________is very expensive.
8. On the Internet, we can know the things in other p_________of the world.
9. -When do you want to go for a picnic, on Sunday or Saturday?
-I am free both days. It all d_________on you
10. LiLei takes the s_________to school every morning.
环境保护费的计算基础是( )。
A.直接工程费
B.直接费
C.直接费+间接费
D.直接费+间接费+利润