微软结束对WindowsXP的支持服务,以下哪项是最好的应对措施()
A.安装360安全卫士
B.开启自动更新功能
C.升级系统至Windows7
D.设置开机密码
参考答案:C
He didn't believe the explanation of the detective and determined to get to the ________ of the case
on his own. [ ]
A. occasion
B. discovery
C. root
D. condition
浮球式钻井液池体积传感器的测量杆内除了装有干簧管外还对应装有电阻,它们的阻值是()Ω。
A、5
B、8
C、10
D、15