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【单选题】
在 PL/SQL 块的哪部分可以对初始变量赋予新值? (选择1项)A.
结尾部分
B.
开头部分
C.
执行部分
D.
声明部分
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反馈参考答案：
举一反三
【单选题】在采用计算机控制的船舶电站系统中，若允许频差设定为0.1Hz
A.
若Δf>0.5Hz，则进入合闸程序
B.
若0.1Hz
C.
若Δf<0.1Hz，则将Δf调整为0.1Hz
D.
先合闸，再进行频率调整
【简答题】Why do we laugh and get amusement from so many different things，from puns (双关语) to pratfalls? Why are some things funny to some people and not to others? How is that while a successful joke can cause ...
【单选题】在采用计算机控制的船舶电站系统中,若允许频差设定为0.1Hz
A.
若△f>0.5Hz,则进入合闸程序
B.
若0.1Hz0.5Hz,则进入合闸程序
C.
若△f<0.1Hz,则将△f调整为0.1Hz
D.
先合闸,再进行频率调整
【单选题】This is the best book _____ I have been looking for all this year.
A.
who
B.
whom
C.
which
D.
/
【单选题】—Where _____ you _____ ? —I was looking for my dog everywhere . [ ]
A.
have ; gone
B.
have ; been
C.
will ; go
D.
have ; been to
相关题目：
【单选题】This is the best book _____ I have been looking for all this year.
A.
who
B.
whom
C.
which
D.
/
参考解析：
知识点：
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