A:豌豆的杂交实验
B:豌豆的自交实验
C:豌豆的测交实验
D:豌豆的反交实验
—_______________.
计算a2a-b-b2a-b的结果为( )
The New Year party is ________ the evening of January 1st.
已知函数f(x)=x3+ax+14, g(x)=-lnx.