Question

    You send a photo to your friend face to face through your 4G mobile phone. He or she can receive it at once. But actually, the photo has to go to the base station first. The base station then sends it to your friend. When you use 5G, the photo will not go to a base station. It will go directly (直接地) to your friend's mobile phone. Your friend receives the photo much faster. This is D2D technology.

1.You ________ when you use 4G.

A.can't send a photo to your friend

B.can send a photo to your friend directly

C.can't send a photo to your friend directly

2.How is photo sent when you use 5G?

A.phone→phone B.phone→phone→base station C.phone→base station→phone

3.Which one is right about 5G?

A.It is not convenient. B.It is much faster. C.It doesn't use D2D technology.

4.What is the text mainly about?

A.D2D technology. B.4G mobile phone. C.5G mobile phone.

Answer

1.C

2.A

3.B

4.A

【解析】

文章介绍了使用4G发送图片时，图片是先发送到基站，然后再发送给朋友；而如果使用5G的话就不需要到基站，会直接发送给朋友，这就是D2D技术。

1.

细节理解题。根据文中You send a photo to your friend face to face through your 4G mobile phone. He or she can receive it at once. But actually, the photo has to go to the base station first. The base station then sends it to your friend.可知，如果使用4G给朋友发送图片的话，不会直接发送给朋友，而是要经过基站，再发送给朋友，故选C。

2.

细节理解题。根据文中When you use 5G, the photo will not go to a base station. It will go directly (直接地) to your friend’s mobile phone.可知，如果使用5G发送图片的话，直接就会发送给朋友，不用经过基站，故选A。

3.

细节理解题。根据文中Your friend receives the photo much faster.可知，使用5G会更快，故选B。

4.

主旨大意题。根据整个文章的理解可知，主要是通过对比4G和5G发送图片的快慢来说明D2D技术，故选A。