Who has a birthday in May? [ ]
A. Xiao Hong's.
B. Me.
C. He.
答案:C
下列氧化还原反应中,1molH2O得到1mol电子的是
A.2F2+2H2O=4HF+O2
B.2Na2O2+2H2O=4NaOH+O2↑
C.2Na+2H2O=2NaOH+H2↑
D.3NO2+H2O=2HNO3+NO
幼儿常见的社会行为主要有()等。