DTH反应
A.去除补体可以增强B.可经血清被动转移C.抗体可以增强其反应D.依赖于T细胞E.去除巨噬细胞可以增强
参考答案:D
Our teacher went to my house to visit my parents . [ ]
A.in the last two days
B.these days
C.some day
D.the other day
已知函数f(x)=x2+2ax+2
(1)若a=-1,求函数f(x)在x∈[-5,5]的最大值和最小值
(2)求f(x)在x∈[-5,5]的最小值为-3,求a的值.