活塞在往复运动中,气体仅在活塞一侧进行压缩的的称单作用式;在活塞两侧都进行压缩的称双作用式。6M32C压缩机属于()。
A.单作用式
B.双作用式
参考答案:B
---How can I get to the People's Hospital?
---Walk straight forward down the pavement. When you see a ten-storied building about 200 meters ______, that's it and you can't _____ it. [ ]
A. in front; miss
B. ahead; pass
C. in the front; catch
D. ahead; miss
红细胞膜上的糖蛋白糖链的相关功能是()
A.膜稳定性
B.受体反应
C.信息传递
D.抗原性
E.红细胞形态