Miss Read is good ____________ music. She is good ____________ children in the music club.
A:at, at
B:with, with
C:at, with
D:with; at
高一:62 73 81 92 95 85 74 64 53 76
78 86 95 66 97 78 88 82 76 89
高二:73 83 62 51 91 46 53 73 64 82
93 48 65 81 74 56 54 76 65 79
用手握住瓶子,使瓶子在竖直方向静止,如果握力加倍,则手对瓶子的摩擦力( )
用动物细胞工程技术获取单克隆抗体,下列步骤中错误的是( )