名校2023版高考英语阅读理解训练含答案df

名校2023版高考英语阅读理解训练含答案

Our planet is home to many radioactive substances-not just in is geologic innards but also in its hospitals, at its industrial sites and in its food processing plants. In Colorado, for instance, 27 buildings house scary-sounding chemical elements such as cesium 137 and cobalt 60. These materials are not there for risky purposes, though. They play a part in cancer treatment, blood irradiation, medical and food sterilization, structure and equipment testing, geologic exploration, etc.

The radioactive material is not always bad in a black and-white way: it can be a useful tool. The rays given off by cesium and cobalt can kill germs multiplying in your meat and make your apples last longer. Radiographic instruments can detect, say, cra cks in a city’s pipes in a similar way to an x-ray picking up a hairline fracture in your knee. A practice called “well logging” uses sealed radioactive sources to map the geology of holes oil seekers drill into the earth. And of course, radiation is key to cancer treatment.

The risk arises because the same radioactive material that is beneficial could also be stolen or misplaced and find its way into

trafficking rings or dirty bombs. It might also barn workers if something accidentally goes wrong during a normal nine-to-five day. In 2017 alone, according to a report from the James Martin Center for Nonproliferation Studies, there were 171 “incidents of nuclear or other radioactive materials outside of regulatory control” based on open source reports, 104 of which happened in the U.S.

An initiative called RadSecure 100 was launched to remove and better secure energetic material in 100 U.S. cities. “Where is the most high-risk material located around the most people?” says Emily Adams, deputy director of a domestic program in the Office of Radiological Security. “And that’s how we got our 100.”

17．What message does the author seem to convey in paragraph 1?

A．Radioactive substances can warm our planet.

B．Food processing does harm to workers in plants.

C．The radioactive material is basically everywhere.

D．It’s hard to remove scary-sounding elements in buildings.

18．Why does the author mention “well logging” in paragraph 2?

A．To make a summary. B．To raise a question.

C．To provide a contrast. D．To support an idea.

19．What is RadSecure 100 intended for?

A．Making use of energetic substances. B．Ensuring safety of the radioactive material.

C．Warning people of the most high-risk material D．Protecting the Office of Radiological Security.

20．What is the writer’s attitude towards the radioactive material?

A．Pessimistic. B．Objective. C．Disapproval. D．Carefree.

CDBB

Instead of a human deliveryman, Beijing resident Xiao Wei received his online order for daily necessities in less than 30 minutes from an unmanned delivery vehicle.

The four-wheeled vehicle named “magic bag”is 1.56 meters high, 2.77 meters long, and 1.19 meters wide. Weighing 500 kg, it can carry about 100 kg of goods at a time and run a distance of 100 km on a single charge with a maximum traveling speed of 20 kph.