#5 Can you trust a smart speaker ?

Q : Do you have a smart speaker at home? 

A : Yes, I have. My smart speaker is Google Assistant. Although I didn't use it  very often, It can bring convenience to life when I used it.

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Q :  What is a smart speaker? 

A : A smart speaker is a device that can give the answers from the questions we ask, or it can  control some home appliance like playing music and switching the light.
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Q :  How does a smart speaker work? 

A : When a smart speaker listen to what we say and catch some key word, it works. Like the system setting instruction, it  search some data from Internet  or follow  the instructions we commend.

#4

#4 I think the Hyperloop can be realistic in the future. By putting it in a vacuum tube, it drastically reducing travel times, and these technologies are more efficient and they save energy. Although  the Hyperloop has not completed yet, and it has several unknown risks, but from small beginnings comes great things. I believe that it will have amazing results in the future.