流动室轴心至外壁的鞘液向下流动,形成包绕细胞悬液的是 ()
A.鞘液流
B.细胞流
C.散射光
D.荧光
E.测量区
参考答案:A
I went to school ______ my father's car yesterday. [ ]
A. on
B. by
C. in
D. with
干式汽缸套和汽缸体采用()。
A.间隙配合
B.过盈配合
C.A、B均可