飞机横向平衡中的滚转力矩主要包括（）.
A、机翼阻力力矩
B、机翼升力力矩
C、水平尾翼力矩
D、发动机推力力矩
参考答案：B
Don't touch anything ________ your teacher tells you to. [ ]
A. if
B. though
C. unless
D. even though
