铰孔的目的是：（）。 A.提高孔的尺寸精度 B.降低表面粗糙度 C.提高硬度 D.提 发布时间：2019-02-15 23:07 │ 来源：www.tikuol.com 题型：多项选择题 问题： 铰孔的目的是：（）。A.提高孔的尺寸精度B.降低表面粗糙度C.提高硬度D.提高耐磨性E.提高表面粗糙度
题型：多项选择题 完形填空 There is a big 1 in our city. We can see 2 animals there. An 3 is the biggest animal on land. Many 4 are flying in the sky. Some beautiful ducks are 5 in the river. Can you see a 6 , too? Itcan swim fast and jump high in water. What are these in the trees? They are 7 . They like eating bananas. Oh, there's a tiger in the cage under the tree. It eats a lot of 8 every day. I like the 9 best because itlives only 10 China.( ) 1. A. farm ( ) 2. A. a lot ( ) 3. A. elephant( ) 4. A. bird ( ) 5. A. running ( ) 6. A. dolphin ( ) 7. A. birds ( ) 8. A. grass ( ) 9. A. tiger ( )10. A. in B. hospital B. lots of B. tiger B. birds B. jumping B. cat B. monkeys B. leaves B. panda B. on C. zoo C. many of C. lion C. chickens C. swimming C. tiger C. cats C. meat(肉) C. lion C. at D. factory D. much D. bear D. ducks D. walking D. giraffe D. dogs D. bamboos D. koala D. ／ 查看答案
题型：多项选择题 中低压凝液中断时，关于乙苯单元生产描述错误的是（）。A.对溴化锂机组的热水系统没有影响B.乙苯单元四台蒸汽发生器失去凝液，无法正常工作C.乙苯单元可以维持正常生产D.蒸汽发生器所发蒸汽可以现场放空 查看答案