Running or walking after dark, backpacking in an unfamiliar city, even taking a taxi alone in the mi

Running or walking after dark, backpacking in an unfamiliar city, even taking a taxi alone in the middle of the night, can all be dangerous activities, especially for women. To offer better protection, some technology companies are looking for a way to develop or expand tools that highlight women’s safety.
In Beijing, on Jun 10, China's smart jewelry brand Totwoo launched a kit called Safety, which is expected to prevent attack on women in the country.
If the user feels threatened, pressing the button for four seconds will activate the device that will start recording for 10 seconds. Within 50 seconds, the device will telephone and send text messages to three emergency contacts to inform them, providing a location, first-aid information and audio recordings. Once a contact responds, the device shakes and lights up to inform the user. The user can disable the alarm by pressing the button three times in succession（连续）.
Around the diameter of a bottle cap, the waterproof piece of jewelry can be attached to a bag, a key or even worn as a necklace. “In Chinese culture, certain jewelry is sometimes worn as a symbol of safely. Our product brings some truth to that,” says Wang Jieming, who founded Totwoo in 2015. It makes sense that the company decided to model the jewelry in the shape of an apple, the name of which in Chinese is “ping guo”, sharing the same pronounced ping as “ping’ an”, the Chinese word for “safety”.
Cooperating with China Mobile, the small core module uses a remote SIM, by passing the need for a physical SIM card. It has certified wireless-charging technology similar to the system used by Apple. Supporting navigation systems such as GPS, Beidou and GSM base station positioning, it car provide accurate location information.
Xin Yang, head of the International Security Defense College in Beijing, a private security training school established in 2011, says an independent device can enhance women’s safety in an emergency, because “mobile phones are often the first item an attacker will attempt to grab or destroy”.
28. Which of the following is right about the device?
A. The user can make video and audio recordings with the device.
B. The device can be switched on and off within minutes.
C. The user can confirm a contacts response without text messages.
D. The device is technically supported by big companies such as Apple.
29. What is the advantage of a smart jewelry over other devices according to Xin Yang?
A. It’s easy to carry and operate.
B. It looks beautiful on women.
C. It symbolizes safety in Chinese culture.
D. It avoids being targeted by an attacker.
30. What is the author’s attitude towards the future of the device?
A. Doubtful. B. Favorable. C. Uncertain. D. Objective.
31. What is the text mainly about?
A. Women can be fashionable and safe.
B. A smart jewelry promotes women’s safety.
C. Women’s safety raises widespread concern.
D. Technology companies find a new way to save women.
答案