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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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【单选题】婴儿8月龄，腹泻呕吐三天入院，体检：发育营养好，体重6.4kg，神萎，烦躁，皮肤弹差，口干，尿量明显减少，口唇樱红，呼吸深快，前囱下陷，心音低钝，二肺(-)腹胀，四肢无力，诊断
A.
轻度等张脱水
B.
中度等张脱水，酸中毒
C.
中度等张脱水，酸中毒，低血钾
D.
中度高张脱水，酸中毒，低血钾
E.
重度低张，酸中毒，低血钾
【单选题】夏季，1岁男孩，发热、呕吐、腹泻3d。体温38℃，每日腹泻10多次，稀便，少量黏液。1d来尿少，6h无尿。查体：眼窝、前囱深陷，皮肤干燥，弹性极差，肢端凉。大便镜检偶见白细胞，血钠 130mmol/L。最有可能的诊断为
A.
婴儿腹泻，中度低渗性脱水
B.
婴儿腹泻，轻度等渗性脱水
C.
婴儿腹泻，中度等渗性脱水
D.
婴儿腹泻，重度低渗性脱水
E.
婴儿腹泻，重度等渗性脱水
【单选题】对婴儿正常生长发育描述错误的是
A.
前囱3～4月闭合
B.
1岁时体重约为出生时体重的3倍
C.
乳牙4~10月萌出，2.5岁出齐
D.
4个月时抬头很稳
E.
后囱在2~3个月内闭合
【单选题】婴儿体重4kg,前囟1.5*1.5,后囱0.2cm,能微笑,头不能竖立,最可能的月龄是:
A.
生后7天
B.
生后15天
C.
生后1-2个月
D.
生后3-4个月
E.
生后4-5个月
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