强力旋压又称为变薄旋压,它是使坯料在芯模上贴紧胎模后,在()施以强力,使坯料辗展变薄。
A.钢板料上
B.芯模缘上
C.旋压头上
D.机床架上
参考答案:C
低剂量Tl-Ag()。
A.引起T细胞免疫耐受
B.引起B细胞免疫耐受
C.引起T、B细胞免疫耐受
D.不引起免疫耐受
E.引起免疫抑制
.The place _____ the bridge is supposed to be built should be _____ the cross-river traffic is the heaviest.
A.which; where.
B.which; in which.
C.at which; which..
D.at which; where.