问题
单项选择题
Which are data-control command in the following statements ( ) ① UPDATE ② GRANT ③ INSERT ④ SELECT ⑤ DROP ⑥ ALTER ⑦ REVOKE ⑧ CREATE⑨ DELETE
A．②,⑦
B．①,③,④,⑨
C．⑤,⑥,⑧
D．②, ⑤,⑥,⑦,⑧
答案
参考答案：A
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