方向舵最大偏转角度是多少（）.
A.25°
B.20°
C.15°
D.10°
参考答案：A
David is taller than _____ in his class.[ ]
A. any student
B. the others students
C. any other student
D. the other student
（）型电力机车为货运机车。
A.SS8
B.SS3
C.SS5
D.SS4
