What're the tips of online safety for teenagers according to the video?
A、To use privacy controls.
B、To protect the password.
C、Don't meet strangers you've met online.
D、To read unsolicited advertising e-mail.
A、To use privacy controls.
B、To protect the password.
C、Don't meet strangers you've met online.
D、To read unsolicited advertising e-mail.
A、population.
B、mean.
C、confidence interval.
D、proportion.
Discovering consists of seeing what everybody has seen and____what nobody has thought.
|
A、A. 3000
B、B. 6000
C、C. 4000
D、D. 2000
A. close the cross-connection valve between the off-center tanks
B. completely flood high center tanks
C. ballast double bottom wing tanks
D. close any opening to the sea in an off-center tank
A、bump
B、venture
C、sail
D、bounce
A、proclaiming
B、striking
C、refusing
D、blowing a trumpet
A、to reach a plateau
B、to decline
C、to climb
D、to peak
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