Question

It seems that electronic devices just keep getting smaller. Scientists in the United States have announced the creation of the first transistor with only two dimensions（二维）.

A transistor is a small electronic device that transfers or carries electronic current. Scientists hope these new 2D transistors will be used for building high-resolution（高分辨率）displays that need very little energy.

Two groups of scientists created these 2D transistors. They report that the transistors are only a few atoms thick.

Usually transistors are made with the element silicon（硅）. Computer processors, memory chips, TV screens and other electronic devices contain billions of silicon-based transistors. But these very small electrical parts have certain limitations.

Dimitris Ioannou is an electrical engineering professor at George Mason University. He says the traditional transistor has been improved as much as it can be.He adds that researchers have been looking for new materials with special features and they want transistors to be seen through and soft.

“If the layers are very thin, the transistor can become flexible, so it doesn't have to be rigid（坚硬的）, like it would be in a silicon chip. So people can think of applications like wearable electronics, television screens and other things,” said Ioannou.

These new transistors can also carry higher current. They also can move the current much faster than traditional transistors. This is important for high-definition screens.

Dimitris Ioannou says the scientific success could prove very useful in the future. "Now, how good and how useful it will be, it's still in the stage of research, but it certainly is an advance," said Ioannou.

1.Which of the following statements about the newly created transistor is TRUE?

A. They are expected to be used in high-resolution displays.

B. The transistors are made with the element silicon.

C. They are rigid, just like traditional transistors.

D. They have already been put into actual use.

2.What does the underlined sentence in Paragraph 5 mean?

A. The traditional transistors have been changed into two-dimensional ones.

B. Many of the traditional transistors have been improved over the years.

C. The traditional transistor has been developed to its fullest.

D. The traditional transistor has been developed quite well.

3.What is Dimitris Ioannou's attitude towards the creation of the new transistors?

A. Negative. B. Neutral.

C. Indifferent. D. Positive.

Answer 1