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单选题
Which frame field do error detection schemes view to perform their function?（）
A
ERR
B
Flag
C
FCS
D
MTU
E
MAC
F
PDU
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单选题Error detection schemes check errors in the data packets by reading which field frame IDs?（）A
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单选题Derek has created a view in the products.nsf database. Derek wants the markup column in the view to display the selling price of the cost. He wants this value to display in currency. Which one of the following should derekl do? （）A
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Use the DESCRIBE VIEW command on the EMP_DEPT_VU view.D
Query the USER_VIEWS data dictionary view to search for the EMP_DEPT_VU view.E
Query the USER_SOURCE data dictionary view to search for the EMP_DEPT_VU view.F
Query the USER_OBJECTS data dictionary view to search for the EMP_DEPT_VU view.
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