1 . If a pancake could dream, it might long for legs so it could jump off your breakfast plate in pursuit of a better, unchewed life. But legs aren’t necessary for something as flat as a pancake to jump around. A group of scientists have designed a pancake-shaped robot that can jump several times per second and higher than seven times its body height. The new robot named Hop, which swiftly jumps without feet, is an important contribution to the soft robotics.
Many ground robots move by rolling or walking. But it’s more efficient for robots to jump over obstacles (障碍物) than to go around them. Although jumping can offer some robots a competitive edge, engineering that ability has been a challenge for robotics researchers. Some soft robots that store energy can perform a single impressive jump very infrequently. Some lightweight soft robots that don’t store energy can jump frequently but can’t jump high or far enough to successfully cross an obstacle.
For inspiration, the researchers looked to gall midge larvae (瘿蚊幼虫) that miraculously throw themselves across distances 30 times as long as their loglike bodies. A gall midge larva bends its body and squeezes the liquid in its body to one end, making it rigid (僵硬的). The accumulation of liquid builds up pressure, and releasing the pressure sends it soaring (飙升). The robot’s body doesn’t resemble (像) that of a gall midge larva, but it jumps like one. Its body is made of two small plastic bags printed with electrodes; the front bag is filled with liquid and the back one is filled with the same volume of air. The robot uses electricity to drive the flow of liquid, which causes the body to bend and generate force with the ground, resulting in a jump. And the air bag imitates the function of an animal’s tail, helping the robot keep a stable position.
While the robot is currently restricted to Earth, it might be right at home exploring another planet. If this is true, the researchers robot might jump over dusty rocks and large holes on the moon or Mars, going where no pancake has gone before.
1. What does the author want to show by mentioning a pancake?| A．A pancake’s dream to have legs is unrealistic. |
| B．A robot is capable of serving a good pancake. |
| C．A pancake-shaped robot can jump without legs. |
| D．Research on pancakes advances our understanding of robots. |
| A．Hop’s avoiding an obstacle. | B．Hop’s moving around by rolling. |
| C．Hop’s performing one remarkable jump. | D．Hop’s jumping high and far continuously. |
| A．They are shaped like logs. |
| B．They have tails to change positions. |
| C．They bend their bodies and increase force. |
| D．They are filled with liquid and have rigid bodies. |
| A．Intolerant. | B．Positive. | C．Indifferent. | D．Ambiguous. |
My mother believed in using things up. Last year, our cornfield had a bad harvest because birds feasted on the crops. It was probably then that Mom’s frugality(节俭)became even more extraordinary. She began keeping everything that seemed useless in the attic(阁楼)—worn-out clothes, old sheets, broken umbrellas, and some other old items. Mom’s favorite saying was “waste not, want not”(俭以防匮). My brother Josh and I weren’t sure what that meant until the “Affair of the Scarecrow(稻草人)”, which, as it later became known, left a lasting impression on us.
The story began with a pretty hat that Mom received as a gift to protect her from the sun. However, Josh and I could see that Mom’s frugal nature and fashion sense were in battle. Mom really didn’t want to get rid of the hat—it was new and had a lot of use left in it—but neither could she stand wearing it. She tried to take off the fancy decorations, but they were stuck on tight. She’d have to find some other solution.
Josh and I watched as Mom headed upstairs to the attic with the hat. “Waste not, want not,” she called back down. We heard boxes being moved around. Moments later, Mom leaned out, holding a flour bag full of straw, and with a mysterious smile, she placed the hat on it.
“What is that for?” I asked, confused. “A scarecrow! ” Mom exclaimed. “But not a good one yet.It needs a strong body to stand firm in the field,” she said with a frown. “And it doesn’t look scary enough,” Josh remarked. I had to admit that Josh, though younger than I was, could sometimes be more imaginative. Josh and I turned to each other, searching for a good idea. Soon enough, Josh’s eyes lit up with inspiration.
注意：1. 续写词数应为150左右;
2. 请按如下格式在答题卡的相应位置作答。
Paragraph 1: “Come with me!” Josh called out.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Paragraph 2: In the following days, the scarecrow stood proudly.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________I sat in the breakfast corner with my four-year-old son, Matthew, trying to ignore the ache in my stomach. I was still recovering from a surgery. I hoped for strength and happiness. But the future seemed so hopeless.
Matthew jumped up from his spot on the kitchen floor. “Bird!” he shouted, rushing to the sliding door. Sure enough, there was a white dove seated on a rubber tree. It sat there a few moments, and then flew away. I’d never seen one in our neighborhood before.
When I dragged myself to the kitchen the next morning, the dove was back. This time it was with a mate carrying twigs (嫩枝), “Look, Matthew,” I said, pointing to the tree. “They’re going to make a nest.” The doves flew in and out of the courtyard all week, building on the top of the rubber tree. Matthew could hardly contain his excitement. Every morning, he’d run into the kitchen and take his spot by the sliding glass door, talking to the birds while they worked. As much as I was grieving (感到悲伤), I couldn’t help but look forward to the doves’ visits too. We watched their progress as if it were a real-life soap opera unfolding before us. Gradually, my pain disappeared, replaced by joy.
Then it all went wrong. The courtyard was a safe enough spot for a nest, but the rubber tree’s broad, thin leaves were far from stable. One night, a strong wind blew through, throwing the doves’ nest to the ground. I heard the twigs break apart. Nothing good ever lasts. I wouldn’t blame the doves if they never came back. But they returned. And they paid no attention to the pi le of sticks that had once been their nest. They started again from scratch, though the wind destroyed all their hard work. The next day, and the next, they renewed their efforts, as if nothing had happened.
注意：1．续写词数应为150左右：
2．请按如下格式在答题卡的相应位置作答。
Paragraph 1: I knew I had to do something for the poor creatures.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Paragraph 2:“The birds were back!” Matthew announced.
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