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【单选题】
You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）A.
Restore the backup control file and open the database with RESETLOGS option.
B.
Perform point-in-time recovery because flashback cannot be performed again on this table
C.
Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
D.
Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
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【简答题】培育和践行社会主义核心价值观是提高国家____的迫切要求。
【单选题】— We'd better go downstairs right now for lunch. — _____ They serve food 24 hours a day. [ ]
A.
Hurry up!
B.
Take your time.
C.
No way!
D.
It doesn't matter.
【多选题】关于塑制法制备蜜丸叙述正确的是（）
A.
含有糖、黏液质较多宜热蜜和药
B.
所用炼蜜与药粉的比例应为1：1～1：1.5
C.
一般含糖类较多的药材可以用蜜量多些
D.
夏季用蜜量宜少
E.
手工用蜜量宜多
【单选题】We'd better hurry up, of the time used up.
A.
Two-thirds; are
B.
Two-thirds; has been
C.
Two-third; is
D.
Two-thirds; have been
【多选题】关于塑制法制备蜜丸叙述正确的是
A.
含有糖、粘液质较多宜热蜜和药
B.
一般情况炼蜜与药粉的比例应为1:1~1:1.5
C.
一般含糖类较多的药材可以用蜜量多些
D.
夏季用蜜量宜少
【多选题】关于塑制法制备蜜丸叙述正确的是( )
A.
含有糖、黏液质较多药粉宜热蜜和药
B.
富含纤维的药物宜用老蜜和药
C.
一般含糖类较多的饮片用蜜量宜多些
D.
夏季用蜜量宜少
E.
手工用蜜量宜多
【单选题】已知在 1mol·L -1 的 HCl 溶液中, E Θ Fe 3+ /Fe 2+ =0.68V , E Θ Sn 4+ /Sn 2+ =0.14V 。讲 20mL 0.10 mol·L -1 Fe 3+ 的 HCl 溶液与 40mL 0.050 mol·L -1 SnCl 2 溶液相混合,平衡时体系的电势为
A.
0.14v
B.
0.50V 正确答案： A
C.
0.68v
D.
0.32v
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