【题目】 Imagine you're standing in line to buy an afterschool snack at a store. You step up to the counter and the cashier scans your food. Next, you have to pay. But instead of scanning a QR code with your smartphone, you just hold out your hand so the cashier can scan your fingerprint. Or, a camera scans your face, your eyes or even your ear.

1 As technology companies move away from traditional password, biometric(生物识别) security, which includes fingerprint, face and voice ID, is becoming increasingly popular.

In 2013, Apple introduced the iPhone 5s, one of the first smartphones with a fingerprint scanner. Since then, using one’s fingerprint to unlock a phone and make mobile payments has become commonplace, bringing convenience to our lives. And since last year, Samsung has featured eye-scanning technology in its top smartphones, while Apple’s new iPhone X can even scan a user’s face.

2 “Biometrics, ideally, are good,” John Michener, a biometric expert, told tech website Inverse. “In practice, not so much.”

When introducing the new iPhone’s Face ID feature at Apple’s Keynote Event in September, Phil Schiller, Apple’s senior vice president, said, “3

But it’s already been done. In a video posted on community website Reddit on Nov 3, two brothers showed how they were each able to unlock the same iPhone X using their own face, Quartz reported. And they aren’t even twins.

“We may expect too much from biometrics,” Anil Jain, a computer science professor at Michigan State University, told CBS news. “No security systems are perfect.”

Earlier this year, Jain found a way to trick biometric security. Using a printed copy of a thumbprint, she was able to unlock a dead person's smartphone for police.

“It’s good to see biometrics being used more,” Jain told CBS News, “because it adds another factor for security. 4

A. But despite its popularity, experts warn that biometrics might not be as secure as we’d imagined.

B. Security experts don’t think it absolutely necessary to use biometric technology.

C. But using multiple security measures is the best defense.

D. Now, this type of technology might not be far away.

E. If a person’s biometric information is stolen, that could have extremely serious consequences for that individual

F. The chance that a random person could look at your iPhone X and unlock it with his face is about one in a million.

【题目】Directions: Fill in each blank with a proper word chosen from the box. Each word can only be used once. Note that there is one word more than you need.

A. tissue B. treated C. potential D. engineering E. environment F. limited

G. procedure H. commercial I. promising J. expanding K. internal

Scientists have developed a new surgical glue that could transform emergency treatments by sealing up critical wounds in the skin or the organs, without the need for staples or sutures(钉合或缝合).

It’s called MeTro. It was developed by researchers from both Harvard Medical School and the University of Sydney, led by Nasim Annabi, an assistant professor of chemical 1. The glue is made from a modified(改良的)human protein that responds to UV light, allowing the application and drying of the gel-like substance in just a minute.

According to the international team of researchers behind the glue, it could quite literally be a lifesaver, sealing up wounds in 60 seconds without stopping the natural 2 and relaxing of the organ or the skin it’s applied to. Wounds 3 with MeTro can heal up in half the time compared with stitches or staples, the researchers claim, and if surgery is required then MeTro can simplify that 4 too. It's also one of several ways researchers are exploring to engineer our body's own natural substances to help repair it when needed.

The 5 applications are powerful – from treating serious 6 wounds at emergency sites such as following car accidents and in war zones, as well as improving hospital surgeries.

MeTro is simple to apply, can be easily stored, and works closely with natural 7 to heal a wound. What’s more, it degrades without leaving any kind of poisonous leftovers in the body.

For now the trials are 8 to animal models. But human trials are in the works, and the results to date are incredibly 9. If the MeTro can be further developed into a 10 product, it could become an essential part of a first responder’s toolkit.

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