The SL2 model is designed for those who have ________.
A. larger heels
B. high arch feet
C. low arch feet
D. lower insteps
查看答案
The purpose of the passage is to ________.
A. describe the idea of the New Balance company
B. explain why New Balance shoes are so popular
C. give a brief introduction to the New Balance company
D. introduce some types of New Balance shoes
晶闸管的阳极阴极之间的电阻
A. 无穷大
B. 0
C. 100欧
D. 1000欧
晶闸管的门级到阴极之间的正向电阻是无穷大
A. 对
B. 错
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