齿轮泵的联轴器不同心将导致()。
(A)油封漏油
(B)泵排液量不足
(C)泵振动大
(D)A、B、C均错
参考答案:C
— Who washed the dishes on the table?
— Lily . [ ]
A. was
B. did
C. had
D. would
目前常用的IL-2检测反应细胞有()
A.IL-2依赖细胞株
B.丝裂原活化的T细胞
C.小鼠胸腺细胞
D.小鼠成纤维细胞株L929
E.Wish细胞株