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【简答题】
配制pH=10的缓冲溶液，应选择的缓冲对是() AHAc - NaAc(pKa=4.76) BNaH2PO4 - Na2HPO4(pKa=7.21) CNH3 - NH4Cl(pKa=9.24) DNa2HPO4 - Na3PO4(pKa=12.7)
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反馈参考答案：
举一反三
【简答题】直流充电桩的监控单元对充电桩的运行状态进行实时监测,对充电桩的___________,充电___________、___________、___________、电池状态等进行实时监控。
【单选题】In the first semester, I asked my teacher______.
A.
what courses should I take
B.
what courses I should take
C.
I should take what courses
D.
should I take what courses
【单选题】Although I felt suspicious at first, I have come to believe what she said that day.
A.
first of all
B.
in the beginning
C.
for a beginner
D.
for the first time
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