溶液中碱基等于阳离子,pH等于()
A.碱基(RN)
B.阳离子(RNH’)
C.离解常数(pKA.
D.酯链(—CO—)
E.酰胺链(—CNH—)
参考答案:C
All of the following are distress signals under the Rules EXCEPT().
A.a green star signal
B.orange-colored smoke
C.red flares
D.the repeated raising and lowering of outstretched arms
借记卡账户应急控制可针对主账户或子账户,应急控制方式分为()。
A.只收不付
B.只付不收
C.不收不付
D.部分金额控制