The teacher often asks us _______ English as _______ as possible.
A:to talk; much
B:to speak; much
C:talk; many
D:speak; many
下列能体现动物社群(会)行为的是( )
维护国家统一是一个国家与民族的共同愿望。我国政府现在的对台方针是( )
第一个等式: a1=21+3×2+2×22=12+1−122+1
第二个等式: a2=221+3×22+2×(22)2=122+1−123+1
第三个等式: a3=231+3×23+2×(23)2=123+1−124+1
第四个等式: a4=241+3×24+2×(24)2=124+1−125+1
按上述规律,回答下列问题:
下列几组动物中,亲缘关系最近的一组是( )