CRH1型动车组司机座椅通过调节转动旋钮和读取台座上的校正显示来调节（）的偏差。
A.座椅深度
B.司机质量
C.司机身高
D.靠背倾斜度
参考答案：B
They have eight ___________ in the classroom. [ ]
A. Light
B. light
C. lights
Wei Hua and I ___________ students.[ ]
A. aren't
B. isn't
C. am not
