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第一章 单元测试
1、
1-1. what is nano scale?
A:10^(-3)~10^(-5)m
B:10^(-5)~10^(-7)m
C:10^(-7)~10^(-9)m
答案: 10^(-7)~10^(-9)m
2、
1-2.Which of the following options is closer to nano size?
A: hair
B: H7N9 virus
C: red blood cells
答案: H7N9 virus
第二章 单元测试
1、
2-1. What is the size of fibers that in our cloth?
A:millimeter
B:micrometer
C:nanometer
答案: micrometer
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