p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;}(09东北

09东北四校联考)下列有关特异性免疫的叙述,正确的是

    A.反应阶段,在抗原的刺激下效应B细胞增殖分化成为记忆细胞

    B.在禽流感病毒感染人体过程中,冼通过细胞免疫来阻止病毒在血液中播散

    C.在体液免疫中需要淋巴因子发挥作用

    D.当同一种抗原再次进入机体时,机会就会出现过敏反应

答案

答案:D

相关题目

Every boy and every girl ______ that each day and each hour brings ______ duty.
Every boy and every girl ______ that each day and each hour brings ______ duty. A.know;their  B.knows;their C.knows;its   D.know;its  
—Do you have the New Chinese-English Dictionary?        —Yes, but no m
—Do you have the New Chinese-English Dictionary?        —Yes, but no more than one copy. Would you like to take            ?        A.some B.them C.it      D.on
《清明上河图》以写实的手法记录了古代开封的繁荣景象。
《清明上河图》以写实的手法记录了古代开封的繁荣景象。下列场景中不可能在画中出现的是(    )A.王家锦帛铺当街而设 B.刘三叔精装字画铺出
The pen ____ she writes letters is broken.A. whichB. thatC. with whichD. by whic
The pen ____ she writes letters is broken.A. whichB. thatC. with whichD. by which  
You may not pay much attention to your daily elevator(电梯) ride. Many of us
You may not pay much attention to your daily elevator(电梯) ride. Many of us use a lift several times during the day without really thinking about it. But Lee Gray, PhD, of the University o f Nort
元素X、Y、Z、M、N均为短周期主族元素,且原子序数依次增大
元素X、Y、Z、M、N均为短周期主族元素,且原子序数依次增大。已知Y原子最外层电子数与核外电子总数之比为3∶4;M元素原子的最外层电子数与电子层
如图,点A、B、P在⊙O上,且∠APB=50°,若点M是⊙O上的动点,
如图,点A、B、P在⊙O上,且∠APB=50°,若点M是⊙O上的动点,要使ABM为等腰三角形,则所有符合条件的点M有(     )(A)1个           (B)2个