×
单选题
马赫配平会自动断开当：Mach trim will automatically disengaged when:
A
只有一个安定面配平通道接通。only one stab trim channel is engaged
B
2个安定面配平通道同时断开。Both stab trim channels are disconnected
C
当空速增长至超过马赫0.4。When airspeed increase greater than mach 0.4
D
当水平安定面在高频率下移动。When movement of the horizontal stabilizer is required at high rate of movement
答案解析
正确答案：B
