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    Businesses are finding more uses for Virtual Reality (VR) as the technology develops. VR is no longer only for gaming or enjoyment. An American company called Blue Goji is using VR to improve one's health by making exercise more fun.

    Blue Goji has offices in Austin, the capital of Texas. The company showed its cardiovascular (心血管的) workout machine, called the Infinity treadmill (跑步机), at the recent South by Southwest festival, an event held every year in Austin.

    A person using the treadmill wears a virtual reality headset when exercising. Before starting, the user tightens a belt to prevent falls. Then, the user plays a VR game while running on the machine. The game can transport the user into the virtual world, where he or she can be racing against virtual people.

    Recently, Leonardo Mattiazzi tested the Infinity treadmill. Mattiazzi said he had a strong feeling to actually get running and do something that pushed his limits. He said the experience was more interesting than running inside the gym without actually going anywhere.

    Constam said the active use of virtual reality helps solve a common problem while wearing a VR headset. She noted that a lot of VR experiences cause motion sickness because people are in motion during the game, but not moving in real life. But when the user is moving on the treadmill and in the game, the chances of motion sickness are reduced.

    However, users who tested the treadmill while wearing the VR headset each had a different experience. Constam said there generally is a learning curve for VR. The first time users feel lost, but "the more you do it, the more you get used to it," she said. Mark Sackler was a first time user. He said he felt a little sick at one point during the game. But he thought the experience was surprisingly realistic.

    After carefully studying the users' experiences, Blue Goji plans to make the treadmill available to the public in 2019.

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阅读《故乡》一文的片段,完成下列问题。

       我于是日日盼望新年,新年到,闰土也就到了。好容易到了年末,有一日,母亲告诉我,闰土来了,我便飞跑的去看。他正在厨房里,紫色的圆脸。头戴一顶小毡帽,颈上套一个明晃晃的银项圈,这可见他的父亲十分爱他。怕他死去,所以在神佛面前许下愿心,用圈子将他套住了。他见人很怕羞,只是不怕我。没有旁人的时候,便和我说话,于是不到半日,我们便熟识了。

       我们那时候不知道谈些什幺,只记得闰土很高兴,说是上城之后,见了许多没有见过的东西。

       第二日,我便要他捕鸟,他说:

       “这不能。须大雪下了才好。我们沙地上,下了雪,我扫出一块空地来,用短棒支起一个大竹匾,撒下秕谷,看鸟雀来吃时,我远远地将缚在棒上的绳子只一拉,那鸟雀就罩在竹匾下了。什么都有:稻鸡,角鸡,鹁鸪,蓝背……”

       我于是又很盼望下雪。

        ……

       这来的便是闰土。虽然我一见便知道是闰土。但又不是我这记忆上的闰土了。他身材增加了一倍;先前的紫色的圆脸。已经变作灰黄,而且加上了很深的皱纹;眼睛也像他父亲一样,周围都肿得通红,这我知道,在海边种地的人,终日吹着海风,大抵是这样的。他头上是一顶破毡帽。身上只一件极薄的棉衣。浑身瑟索着;手里提着一个纸包和一支长烟管,那手也不是我所记得的红活圆实的手,却又粗又笨而且开裂,像是松树皮了。

       我这时很兴奋。但不知道怎么说才好,只是说:

       “阿!闰土哥,﹣﹣你来了?……”

       我接着便有许多话,想要连珠一般涌出:角鸡,跳鱼儿,贝壳,猹,……但又总觉得被什么挡着似的,单在脑里面回旋,吐不出口外去。

       他站住了,脸上现出欢喜和凄凉的神情;动着嘴唇,却没有作声。他的态度终于恭敬起来了,分明的叫道:

       “老爷!……”