【判断题】一批轴要进行粗加工和精加工,通常应至少分成两道工序
【判断题】硅橡胶按照硫化温度为高温硫化和室温硫化两种,前者是高分子质量的固体胶,后者是低分子质量的液体胶。
【多选题】Exercise A Watch the video. Check the benefits of Photo Camp.
A.
The students can learn how to take photos.
B.
Photo Camp helps to raise money for refugees.
C.
Some students will be able to use their new skill in their future life.
D.
The photos that students take are published in a magazine.
【单选题】近代技术上曾经出现过( )次技术体系更迭。
【简答题】Watch the video. Fill in the blank and tranlate it into Chinese.
【简答题】A.She is quite young. B.She is middle-aged. C.She is 40 years old. D.She is of the retirement age.