下列醇能发生催化氧化反应，生成醛的是 [ ]
A．
B．
C．
D．CH3OH
CD
Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）
A.Navigational warnings
B.Weather warnings
C.SAR and distress alert information
D.All of the above
说明数组后，数组元素的初值是______。
A．整数0 B．不定值C．逻辑真 D．逻辑假
