3.看第二题:
A) It produces electricity for electronic devices while the wearer walks.
B) It can be used as cell phones, GPS in the military actions or field studies.
C) It is small and convenient. 它又小又方便。
题目的意思:由Lawrence和他的同事所发明的背包最重要的特征是什么?这是一道细节题。一起读第二段:
通过对这一段的学习,我们知道了这种背包最重要的特性就是:当背上它的人一边走就会一边产生电能。所以答案为A。
3. The word springs in Paragraph 3 means ____________.
B) the season of the year, occurring between winter and summer.一年中的一个季节,介于冬季和夏季之间
D) a length of metal wound around, which returns to its original shape after being pushed. 来回绕的一段金属,在被挤压后能回复它的原形
The backpacks electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.
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