下列现象属于特异性免疫的是()

--- How was your vacation in Shanghai?

--- Oh, __________, I can ’t stand it.There were too many people and the weather was too hot.

计划免疫的目的是()

---Do you like this movie?

--- Yes, I do! In fact I ’ve never seen a ________ one than this.

第二性征的出现与何种激素的作用直接有关()

My father is a reporter. He works in a ___________.

近视在眼球结构上的变化是()

--- Hello, can I speak to Mr. Green, please?

--- I ’m afraid not. He ______ a meeting now.

下列现象中属于条件反射的是()

人体内静脉血变为动脉血，是由下列哪一生理过程完全成的（）