In June,China's last satellite of its BeiDou Navigation Satellite System(BDS)was launched into orbit,marking the completion of the whole system.

In ancient China,people used the Big Dipper,【小题1】is known in Chinese as"beidou qixing," to navigate.China's navigation satellite system【小题2】（name)after"Beidou”，which carries the meaning of"pointing out the right direction."China started constructing the BeiDou Navigation Satellite Experimental System(BDS-1)back in 1994,and now it consists of 55 satellites and can provide services worldwide.

【小题3】(compare)with other satellite navigation systems,the BDS operates more satellites in high orbit,and transmits navigation signals at more frequencies.These features enable better more accurate services.Apart 【小题4】 navigation,the BDS also provides diverse services,such as short message communication,and free international search and rescue 【小题5】(assist).The BDS has been applied in transportation,agriculture and other traditional fields.

As 【小题6】 open system featuring shared benefits,the BDS has been seeking to serve a 【小题7】(wide)range of countries and international organizations.BDS-related 【小题8】(product),as is reported,are now being used in more than 120 countries and regions.Projects based on the BDS for precision farming,smart port construction and digital construction have been carried out in many countries across Asia,Europe and Africa.China is also 【小题9】(active)communicating with Russia and European countries 【小题10】(improve)the compatibility of the BDS so that it can better serve its global users.

Turn Gadgets off for Better Vacation

It is that time of the year again: school has started in full swing, homework is piling up and you realize that you 【小题1】 hardly wait for summer next year.

“I need a holiday,” you may be thinking. Wait—is it a holiday 【小题2】 you truly need? When we think of holidays, we think of travelling, beaches, fun, and adventures. But the reality is that we spend most of our holidays on our personal devices. Smartphones have taken the world by storms, 【小题3】(influence) the manner we interact with each other. Does this sound like you? If so, it sounds like you need a digital detox(数码产品戒毒期).

One of the best things about a digital detox is the fact that anyone can do it. 【小题4】 you are a businessman or a student, everyone needs some time away from technology.

Having a tech-free holiday 【小题5】 (become) increasingly popular especially among families because it enables them to spend quality time with each other instead of 【小题6】 (distract) by texting, emails, and social media.

While it may seem that sending a quick text massage or uploading a photo to WeChat does not take so much time, these things eventually add up 【小题7】 us even knowing it.

Whether to give yourself a digital detox is a different decision to make, 【小题8】 it may be just the thing you need to cleanse your mind, body, and soul.

Taking a tech-free holiday would be a good time to pick up 【小题9】 new, or return to hobbies which you never had time for. You could paint the view of the coast, or take photos with your old film camera. If you are going with friends or family, perhaps bring along some board games 【小题10】 (spend) time relightening tired relationships.

An American novelist Jonathan Franzen tells readers that he appreciated real, printed newspapers more “as the Internet rose to power, disseminating information that could be trusted as little as it cost to read it.”

That’s 【小题1】 turn of phrase that we could apply to the discussion of Internet rumors(谣言)and their impact: this kind of information can 【小题2】 (trust) as little as it costs to read it. That is, we can’t trust it at all. Franzen may be overstating the case to make a point. There are, after all, plenty of ways that the Internet has provided access to information that is trustworthy and accurate, not to mention helpful. The problem is 【小题3】 the Internet also has flooded our lives with less accurate and less trustworthy material.

“Digital literacy” is the name for this 21st century skill, and it is becoming as fundamentally important as literacy itself. So 【小题4】 do we tell the real from the false?

Like anything, it takes practice at asking questions and, above all, paying attention to details 【小题5】 (give) already. Who is the author? Do you know a real name or just a username(用户名)? Why 【小题6】 you trust this person? Does he or she provide some credentials (证明)? There are big differences in the domains, and it is important to understand 【小题7】.

It was 【小题8】 (easy) to tell a trustworthy source in the days before the Internet. Then, we all knew which newspapers had the highest standards and which ones were more for sensation and entertainment than for real news and commentary.