题目

下列人体对流感病毒的免疫调节中，属于体液免疫的是（   ） A.皮肤阻止了流感病毒进入机体内 B.吞噬细胞在病毒侵入初期将其吞噬消化 C.效应T细胞与靶细胞接触，使靶细胞裂解死亡 D.病毒侵入人体后，机体产生抑制病毒活性的抗体 答案：D（题文）【1】（小题1）My favorite toy is a ________.A. monkey B. panda C. dog【2】（小题2）On its face, it has _______ eyes and a _______ nose.A. big; small B. small; big C. big; big【3】（小题3）It has two _______ ears on its head.A. white B. green. C. black【4】（小题4）It has a round white _______.A. body B. legs C. feet【5】（小题5）It ______ feels sad or angry. It ______ looks happy!A. always; never B. never; sometimes C. never; always