题目内容：

    Described as the world’s most environmentally friendly protein, Solein is made by applying electricity to water to release bubbles of carbon dioxide and hydrogen. Living microbes(微生物) are then added to the liquid to feed on the carbon dioxide and hydrogen bubbles and produce the Solein, which is then dried to make the powder. It’s a natural fermentation(发酵) process similar to beer brewing. The dried Solein has a protein content of 50 percent and looks and tastes just like wheat flour.

“It is a completely new kind of food, a new kind of protein, different to all the food on the market todav in how it is produced as it does not need agriculture.” Dr Pasi Vinikka, the chief executive of Solar Foods told The Guardian. The process used to produce Solein — converting hydrogen and carbon dioxide to calories — is amazing, as the wonder food can be produced anywhere in the world. It’s also 10 times more energy-efficient per hectare than photosynthesis (光合作用), and 10 to 100 times more environment and climate-friendly in water use than animal or plant based food production.

“Solein also contains all the essential amino acids(氨基酸), but because it is produced using carbon dioxide and electricity, it does not require large amounts of land to produce,” the Solar Foods website explains. “Another unique characteristic of Solein is that it is able to take carbon directly from carbon dioxide without needing a source of sugar.”

While Solar Foods does not expect Solein to challenge conventional protein production methods in the next two decades, it does expect it to become a “new harvest” for humanity, which is significant considering so far we have only relied on plants and animals for sustenance. The Helsinki-based company plans to open its first Solein factory at the end of 2021 and scale up production to two billion meals per year by 2022.

1.Which of the following statements best describe the features of Solein?

A.It is a new kind of food containing all the nutrition.

B.It is made from water and carbon dioxide by applying electricity.

C.It is produced without consuming much land and energy.

D.It is a kind of man-made wheat flour.

2.What does the underlined word “converting” mean?

A.relating B.changing

C.contributing D.adapting

3.What can be inferred from the last paragraph?

A.The company thinks Solein would have a rewarding future.

B.Solein is supposed to challenge traditional protein production.

C.There is still a long way for Solein to be put into production.

D.Humans can completely rely on Solein to survive.

4.What’s the author’s purpose in writing this passage?

A.To promote a new kind of technology.

B.To introduce a new kind of food.

C.To make an ad for a new kind of protein.

D.To call on people to protect the environment.