1．(2019·全国卷Ⅰ)The researchers say that the keyboard should be pretty straightforward to commercialize and is mostly made of inexpensive, plasticlike parts. 零部件
2．(2017·江苏卷)Farmers in many countries are also adapting like this — either by growing new produce, or by growing the same things differently. 农产品
3．(2016·北京卷)Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped in powerless highrise buildings. 一段楼梯
4．(2015·天津卷)Items that are not allowed in student rooms include: candles, ceiling fans, fireworks, waterbeds, sun lamps and wireless routers. 风扇
