在Mysql数据库中删除test账号的语句正确的是 A: drop use B: drop ues C: drop user test D: delete test

电路如图所示，已知US = 6V，R1 = R2 = 8Ω。将图(a)中的电路等效成为图(b)中的电压源，则其中的Ues 和R0 分别为(    )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/bcae545d124744f19c98ff7718b7d873.png

What are the steps for scanning？ A: Have a clear idea of what specific information we are looking for. B: Predict how the answer will appear and what clues you may use to locate the answer. C: Ues the fingers to point at the text and the eyes move togther with the fingers to locate the answer