2020-02-25到2020-07-31
Unit 1 The History of Materials 第一单元单元测试
1、 Which of the following material is representative in exotic materials age?
A:aluminum
B:biomaterials
C:wood
D:alloy
答案: biomaterials
2、 ”From the very beginnings of prehistory, humans have manipulated substances so that they would be moreuseful.” What does the word “manipulate” mean in the sentence?
A:look after
B