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【单选题】
TCAS计算机在近地警告计算机发出（）发出决断咨询（RA）音频警告。
A.
“低于下滑道”警告时不能
B.
“拉起”警告时仍可能
C.
“拉起”警告时须立即
D.
“低于下滑道”警告时须立即
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】[音频] question 12: What is the best thing about iPads according to the couple?
A.
They ma k e f or exce 11 ent entertamment.
B.
They are useful for the annual family vacat10n.
C.
They keep children at different age levels occupied.
D.
The y are helpful when going to the grocery store.