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单选题
缝翼/襟翼位置指示显示在EICAS主页：Slats/Flaps position indications are displayed on EICAS primary page:
A
任何时候 At all times.
B
当襟翼选择大于0度。When flaps are selected greater than zero degrees.
C
当起落架未收上锁定。When the Landing Gear is not up and locked
D
b) 和 c)都正确，另外当BTMS在操作红区范围。 Both b) and c) are correct but in addition also when BTMS is in red range of operation.
答案解析
正确答案：D
