1. (2024高二下·桐城开学考) /span>.阅读理解

As people become more aware of the importance of eco-friendly power sources, we have devoted much time to inventing creative devices. A newly developed paper battery promises to make a big difference to single-use electronics.

The battery is crafted from sustainable materials, which not only strengthens its eco-friendliness but also makes it cost-effective to produce. This combination of biodegradability (可生物降解) and affordability makes it attractive for a wide range of applications. Another standout feature of this paper battery is its flexibility in terms of shape and size. Unlike traditional batteries that are available in fixed sizes, this paper battery can be tailored to meet diverse requirements.

In reality, the paper battery is enough to power an LCD alarm clock. "While it won't be charging up your computer anytime soon, there's lots of potential for low-powered sensors. We present a printed paper battery developed to power single-use disposable electronics and to reduce their environmental impact to the lowest level," write the researchers in their published paper.

The battery is based on a metal-air electrochemical cell. Made from sodium chloride salt-diffused (氯化钠盐扩散的) paper, it can measure as little as one square centimeter, and is based on printed inks. All that's needed, then, is a small amount of water, as little as two drops. This dissolves the salts within the paper, and then activates the battery as they travel. The battery starts producing power around 20 seconds after water is added, according to the experiments carried out by the team.

Although the performance decreases over time as the paper dries out, it can be topped up to some extent with more water. The researchers say they want to improve the efficiency of the battery in the future, and get it working for longer. "With a rising awareness of the e-waste problem and the emergence of single-use electronics for applications, there is a growing need for low environmental impact batteries," write the researchers.

1. （1） Which is a feature of the paper battery?

   A . It is made from single-use materials. B . It is costly to put together. C . It can be used to charge up your computer. D . It can be produced in diverse shapes.
3. （2）  What can we learn about the paper battery according to the text?

   A . It can be applied to any electronics. B . It is able to supply energy to our cell-phones. C . Its power can be refilled by adding some water. D . It has reduced the environmental impact to the lowest.
5. （3） What's the main idea of paragraph 4?

   A . What the paper battery consists of. B . How the paper battery works. C . Where the paper battery can be applied. D . Why the paper battery is popular.
7. （4）  What is most likely to be the focus of future research according to the researchers?

   A . How to get rid of impacts of single-use electronics. B . How to improve the efficiency of the paper battery. C . How to reduce the demand for single-use electronics. D . How to raise people's awareness of e-waste problems.