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【单选题】
铰链四杆机构中各构件以 _______ 相联接。A.
转动副
B.
移动副
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反馈参考答案：
举一反三
【单选题】Which statement about using RMAN stored scripts is true?（）
A.
To create and execute an RMAN stored script, you must use a recovery catalog.
B.
When executing a stored script and a command fails, the remainder of the script is executed, and a message is written to the alert log file.
C.
RMAN stored scripts can always be executed against any target database that is registered in the recovery catalog.
D.
When you execute a stored script, it always executes using the persistent channel settings previously set with the CONFIGURE command.
【简答题】在霍尔效应研究实验中,同样条件下霍尔元件与磁场方向不垂直,对测量结果有何影响?
【简答题】褶皱作用引起的煤层厚度变化,一般在褶皱的_____增厚。
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