白细胞分化抗原
参考答案:
解析:是指血细胞在分化成熟为不同谱系、不同阶段以及细胞活化过程中,出现或消失的细胞表面标志。
看图完成故事,每空一词。
Last night Mr. West ___________ (have) a big dinner and ___________ (drink) a lot of Coke. He watched
TV and then ___________ (go) to bed. At midnight he ___________ (hear) a noise at the door. He opened the
door and ___________ (see) a monster. The monster ___________ (be) hungry. It didn't like meat or fish. It
liked eating chairs, tables and clothes. At first Mr. West didn't know what to do but then he opened the window and ___________ (jump) out of it. He hurt his head and ___________ (break) his leg. Suddenly he __________
(wake) up. He wasn't on his bed. He was on the floor. He had a headache but he was happy. The monster
___________ (be not) there. It was only a bad dream.
天然花岗石板材的技术要求包括()。
A、规格尺寸允许偏差
B、平面度允许公差
C、角度允许公差
D、外观质量
E、化学性能