问题
单项选择题
ECDIS should be capable of（）all chart information necessary for safe and efficient navigation originated.
A.Exhibiting
B.Existing
C.Demonstrating
D.Displaying
答案
参考答案：D
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ECDIS should be capable of（）all chart information necessary for safe and efficient navigation originated.
A.Exhibiting
B.Existing
C.Demonstrating
D.Displaying
参考答案：D
pC(g)＋qD(其中A和C都是无色气体)，当达到平衡时，下列叙述正确的是( )