（一）十題，題號自第 31 題至第 40 題，每題四分，計四十分。 

（二）每題五個選項各自獨立，其中至少有一個選項是正確的，每題皆不倒扣，五個選項全 部答對得該題全部分數，只錯一個選項可得一半分數，錯兩個或兩個以上選項不給分。 

（三）請將正確答案以２Ｂ鉛筆劃記於答案卡內。

       Researchers have been working to make mind-controlled prosthetics a reality for at least a decade. In theory, an artificial hand that amputees could control with their mind could restore their ability to carry out all sorts of daily tasks, and dramatically improve their standard of living. 

       However, until now scientists have faced a major barrier: they haven't been able to access nerve signals that are strong or stable enough to send to the bionic limb. Although it's possible to get this sort of signal using a brain-machine interface, the procedure to implant one is invasive and costly. And the nerve signals carried by the peripheral nerves that fan out from the brain and spinal cord are too small. 

       A new implant gets around this problem by using machine learning to amplify these signals. A study, published in Science Translational Medicine today, found that it worked for four amputees for almost a year. It gave them fine control of their prosthetic hands and let them pick up miniature play bricks, grasp items like soda cans, and play the Rock-Paper-Scissors game.

        It's the first time researchers have recorded millivolt signals from a nerve--far stronger than any previous study. The strength of this signal allowed the researchers to train algorithms to translate them into movements. "The first time we switched it on, it worked immediately," says Paul Cederna, a biomechanics professor at the University of Michigan, who co-led the study. "There was no gap between thought and movement."

　　World Water Day has been celebrated internationally for more than 20 years. It was first   13   in 1993. Every year, events across the globe take place to   14   attention to the critical water situation and to raise awareness about the world’s water woes. 

　　People living in the United States and other wealthy nations may not be   15   the world’s water crisis. Easy access to drinking water seems as   16   as being able to breathe the air. But countries around the world, especially in Sub-Saharan Africa and South Asia, are suffering a water crisis. 

　　In 2004, 2.2 million deaths worldwide were   17   on unsafe drinking water. Of those, nearly 90% were children under the age of 5. Children are especially   18   by the world’s water crisis. A lack of clean, safe drinking water is responsible for the deaths of   19   4,500 children every day internationally. 

　　Even though the water crisis is one of our world’s biggest challenges, there is hope. You can   20   to help, not just on World Water Day, but every day. Conserve water in every way that you can!