填空题Another interpretation to Senju’s findings is that contagious yawning is thought to be cued by changes around the yawning person’s eyes.____

Everybody sleeps,but what people stay up late to catch—or wake up early in order not to miss—varies by culture.From
data collected,it seems the things that cause us to lose the most sleep,on average,are sporting events,time changes,and
holidays.Around the world,people changed sleep patterns thanks to the start or end of daylight savings time.Russians,for
example,began to wake up about a half hour later each day after President Vladimir Putin shifted the country permanently to“winter time”starting on October 26.
Russia’s other late nights and early mornings generally correspond to public holidays.On New Year’s Eve,Russians have the world’s latest bedtime,hitting the hay at around 3:30 am.Russians also get up an hour later on International Women’s
Day,the day for treating and celebrating female relatives.
Similarly,Americans’late nights late mornings,and longest sleeps fall on three-day weekends.Canada got the least sleep of the year the night it beat Sweden in the Olympic hockey final.
The World Cup is also chiefly responsible for sleep deprivation,the worst night for sleep in the U.K.was the night of the
England-Italy match on June 14.Brits stayed up a half-hour later to watch it,and then they woke up earlier than usual the next morning thanks to summer nights,the phenomenon in which the sun barely sets in northern countries in the summertime.That was nothing,though,compared to Germans,Italians,and the French,who stayed up around an hour and a half later on
various days throughout the summer to watch the Cup.
It should be made clear that not everyone has a device to record their sleep patterns,in some of these nations,it’s likely
that only the richest people do.And people who elect to track their sleep may try to get more sleep than the average person.
Even if that’s the case,though,the above findings are still striking,if the most health-conscious among us have such deep
swings in our shut-eye levels throughout the year,how much sleep are the rest of us losing

What does the author say about people’s sleeping habits 《》（）

A.They are culture-related
B.They affect people’s health.
C.They change with the seasons.
D.They vary from person to person.

资料：Directions : There is 1 passage in this part. The passage is followed by some questions or unfinished statements. For each of them there are four choices , You should decide on the best choice.
Your face is the future of smartphone security. Apple made that clear last week when it unveiled the pricey iPhone X. Apple claims to have conquered many of the challenges that have prevented the widespread use offacial biometrics. But a number of computer-vision researchers say they are skeptical that a smartphone-based system like FaceID can account for things like variable lighting conditions or subtle changes in a person's appearance to create a secure-yet-practical way to unlock a phone a dozen or more times a day.
Apple’s new technology does sound promising. The company says FaceID creates a “precise depth map” of one’s visage by projecting more than 30,000 infrared dots against a person’s face, then using the phone’s infrared TrueDepth camera and high-power microchip to collect and analyze the results. Users are also asked to turn their head as they scan so the phone's machine-learning algorithm can measure the face from several angles and create a more detailed 3-D map of their features. Once the map is created and stored, the iPhone X uses infrared light to help FaceID scan a person’s face even in the dark. Meanwhile, machine-learning algorithms running on the phonekeep track of changes in a person's appearance—including glasses, facial hair and hats—so the smartphone’s accuracy improves over time.
Despite advances in facial recognition in recent years, it remains unclear whether FaceID will work in a variety of conditions while also keeping the iPhone X secure. Hackers, for example, quickly found a way to bypass the Samsung Galaxy S8's facial-recognition scanner when it was introduced in March: They tricked the device by simply showing it a photo of the user. FaceID’s use of 3-D facial maps could address that problem. But historically it has been a big challenge for such a system to recognize faces under different lighting conditions and from a variety of angles.
Apple showed off FaceID last week under relatively controlled conditions, says Arun Ross, a professor of computer science and engineering at Michigan State University. "Clearly the demo was very interesting," he says. "But at the same time some extraordinary claims were made." Apple' s Schiller said, for example, that the chance a random person' s face could unlock someone else' s iPhone X was one in a million——much more secure than TouchID. Ross says, however, that it is not clear how often FaceID fails to recognize its owner. When contacted, Apple declined to elaborate on Schiller' s comments.
“Like all biometrics, FaceID will have a problem with revocation,” says Vitaly Shmatikov, a computer science professor at Cornell Tech. “If a password is compromised, it can be changed—but a face cannot be changed.” Apple touts its ability to secure data on its iPhones, which do not share biometric information with the company’s servers. Still, Ross says, hackers always seem to find a way around even the tightest security.

Why does the author mention Vitaly Shmatikov saying "a face cannot be changed" ?

A.To infer that a person' s face is highly unlikely to change to another shape.
B.To illustrate that the image stored in the phone cannot be changed if FaceID is compromised.
C.To explain the revocation difficulty of FaceID.
D.To enhance the data security on iPhone since it do not share biometric information with servers.