读作﹣12减8减6加5或﹣12,﹣8,﹣6的和与5的和.
下列几种动物群体中,不具有社群行为的是( )
如图所示,要使磁铁M的磁性最强,应将滑动变阻器滑片P移至____端,并将开关S接到位置____.
Though Nancy is____, she can do most things that people with good eyes can do.