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Israeli researchers say they have invented a reusable face mask. This mask can kill the coronavirus with heat by drawing power from a mobile phone charger.

The disinfecting(消毒) process takes about 30 minutes. And users should not wear the mask while it is plugged in, said Professor Yair Ein-Eli, who led the research team at Technion University in Haifa. The new mask has a USB port that connects to a power source such as a standard cellphone charger. The charger heats an inner layer of carbon fibres to 70 degrees Celsius, high enough to kill viruses.

Ein-Eli said disposable masks were in high demand globally during the health crisis, but they were not economically or environmentally friendly. “You have to make it reusable and friendly, and this is our solution,” he said.

During testing, the prototype was exposed to 20 heating cycles, each for half an hour, with no impact on durability, Ein-Eli said. “We can guarantee it up to a few dozen cycles, without any risk,” he added. The prototype looks like a standard N95 face mask. It has a valve(阀) at the front and bands to hold it in place around the head.

The researchers submitted a patent for the mask in the United States in late March. They say they are discussing commercializing the product with the private sector. It will likely sell at a $1 over the price of a typical disposable face mask, the researchers say.

1.What can we know about the new mask?

A It takes 30 seconds to disinfect the mask.

B Users can wear the mask while it is plugged in.

C The new mask can be heated to 80°.

D It can kill viruses with heat from a mobile phone charger.

解析：选D。细节理解题。根据文章第一段第二句This mask can kill the coronavirus with heat by drawing power from a mobile phone charger.可知这种口罩可以通过手机充电器加热来杀死病毒，故选D。

2.What’s the research team’s solution during the health crisis?

A To make reusable masks.

B To ask people to stay at home.

C To make more disposable masks.

D To tell people to protect themselves.

解析：选A。推理判断题。根据第三段最后一句“You have to make it reusable and friendly, and this is our solution,” he said.可知要解决问题，就要使口罩可重复使用，并且环保，故选A。

3.What does the new mask look like?

A A surgical mask.

B A children mask.

C A standard N95 face mask.

D An ordinary N95 face mask.

解析：选C。细节理解题。根据文章第四段The prototype looks like a standard N95 face mask.可知这种口罩原形就像标准的N95口罩，故选C。

4.Which is NOT true according to the passage?

A The new mask has a USB port.

B The new mask will sell at only $1.

C The new mask has a valve at the front.

D Disposable masks are not environmentally friendly.

解析：选B。细节理解题。根据最后一段最后一句It will likely sell at a $1 premium over the price of a typical disposable face mask, the researchers say.可知这种口罩的售价可能比普通的一次性口罩高出1美元，故选B。