某几何体的三视图如图所示，则该几何体的体积为（   ）

下图是有关人体免疫过程的示意图，有关该图的各种叙述中，正确的是 （   ）

①图示过程的发生对维持人体内环境的相对稳定有利
②注射抗生素治疗疾病属于图中“④”过程
③人体发生过敏反应的根本原因是过敏原刺激机体产生的物质A吸附到某些细胞的表面
④细胞a既参与特异性免疫，又参与非特异性免疫
⑤其中“①”和“⑤”过程的发生与细胞膜上的糖蛋白有关
⑥“②”过程的完成是细胞内基因选择性表达的结果。

我国对资本主义工商业进行社会主义改造的过程中，实现了和平过渡的创举是（    ）

- ____ (Do/ Does) you like playing volleyball? – Yes,I do.

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