Question 20 is based on the passage you have just heard.

听力原文

        (19) [A pair of entrepreneurs are planning to build and launch a spacecraft that would carry and roast coffee beans in outer space.] The craft will use the heat of re-entry to roast coffee beans as they float inside it in a pressurised tank. The effect would be to roast the beans all over and produce perfect coffee. The businessmen say that (20) [on Earth, beans can easily break apart and get burned in the roaster.] But if gravity is removed, the beans float around in a heated oven, receive 360 degrees of evenly distributed heat and roast to near perfection. The spacecraft will reach a height of around 200 kilometers. The beans would then be roasted in the heat generated by the craft’s 20-minute re-entry into Earth’s atmosphere. Temperatures in the pressurised tank will be kept to around 200 ℃. Once back on Earth, the planet’s first space roasted beans would be used to make coffee that would be sold for the first time in Dubai. This is where the pair’s company is based. It is not clear how much they would charge for a cup. Surprisingly, the Space Roaster concept, should it go ahead, will not be the first attempt to take coffee into space. (21) [In 2015, two Italian companies collaborated on the construction of a similar type of spacecraft, which was the first coffee machine designed for use in space.] 

20. What does the passage say about coffee beans roasted on Earth? （关于在地球上烘烤的咖啡豆，这篇文章说了些什么？）

解析：A。录音前半部分提到，在地球上，咖啡豆很容易破裂，被烤箱烤焦。A项与此内容相符，其中的easily和get burned均为原词复现，故为正确答案。

错项排除：在录音中，“飘浮在烤箱里”和“受热均匀”都是描述在外太空烘烤咖啡豆的情形，而不是在地球上，B项和D项不符合题意，故均排除。C项利用录音中的360 degrees设置干扰，但这里说的是360度全方位烘烤咖啡豆，而不是要加热到360摄氏度，故C项错误。