题目内容：

    Artificial flesh is growing ever closer to the real thing. Scientists in Australia have now created a new jelly-like material which they claim has the strength and lasting usage of actual skin, ligaments(韧带）,or even bone.

“With the special chemistry we’ve engineered in the hydrogel(水凝胶）,it can repair itself after it has been broken like human skin can,” explains chemist Luke Connal from the Australian National University. “Hydrogels are usually weak, but our material is so strong it could easily lift very heavy objects and can change its shape like human muscles do.”

Having a wet and soft material with such remarkable properties could be very important for the development of next-generation soft robotics and biomedical devices. Creating a shape-changing hydrogel that has multiple functions has proved an ongoing challenge for scientists, even with natural inspiration from sea creatures, such as jellyfish, sea cucumbers, and Venus fly traps.

While some hydrogels can withstand mechanical stress, others have self-healing properties, and a few more have the abilities to memorize shapes or change colours. As far as the ANU researchers know, no one else has been able to incorporate all these functions into one all-encompassing gel. At least, not at the speed and efficiency they’ve achieved.

Using this material, the researchers made extremely thin films of “flesh” without any breakage.

When these films were heated or cooled, they then changed into different shapes, bending one way or the other before returning back to their original state along with the temperature. If temperature is somehow used as a control, the authors think this gel could one day be moved like an artificial muscle. Researchers are trying to modify their temperature control technology accordingly and make a significant step towards turning this hydrogel into practical use.

1.What do you know about the new material according to the text?

A.It looks like the jelly and functions like the robot.

B.It can be easily repaired by scientists after being broken.

C.It is likely to be the most multifunctional hydrogel at present.

D.It can hardly go back to its original shape after heated or cooled.

2.What is the author’s attitude towards the future of the dynamic hydrogel?

A.Indifferent.

B.Neutral.

C.Negative.

D.Positive.

3.What is the best title for the text?

A.Getting scientific inspiration from nature.

B.Lifting heavy objects by dynamic hydrogels.

C.Creating a new kind of flesh with chemistry.

D.Enabling artificial robots to heal themselves.

4.What will the author most probably talk about in the following paragraph?

A.The characters of artificial flesh.

B.The creation of the dynamic hydrogel.

C.The shapes and colors of artificial flesh.

D.The application of the dynamic hydrogel.