题目内容
关于下面角色操作语句，描述正确的是CREATE ROLE R1；GRANT SELECT，UPDATE，INSERTON TABLE StudentTO R1；GRANT R1 TO 王平，张明，赵玲；
查看答案
搜索结果不匹配？点我反馈
更多问题
Fill in the blanks with the proper conjunctions（用适当的连接词完成句子。）1. I can’t decide _____ dictionary I should buy.2. It suddenly occurred to him ____ he had left his keys in the office.3. _____ struck me most in the movie was the father’s deep love for his son.4. ______ we need is more time.5. _____ one of you breaks the window will have to pay for it.6. ______ and ____they will meet has not been decided yet.7. Please tell me _____you are waiting for.8. Is that _____ you are looking for?9. Would you please tell me _____ the nearest post office is?10. I don’t know _____ he will agree to the plan or not.
某电感线圈,接入直流电,测出R=12Ω;接入工频交流电,测出阻抗为20Ω,则线圈的感抗为()。
电阻元件上的电压、电流的初相一定都是零,所以它们是同相的。()
在同一交流电压作用下,电感L越大,电感中的电流就越小。()
微信支付 
支付宝支付