––I really want to go to the________. How about you?
–– So do I. We can swim in it.
A:water park
B:aquarium
C:zoo
D:space museum
如图所示是“探究电磁铁磁性强弱与哪些因素有关”的实验,想让电磁铁吸引更多的大头针,可行的做法是( )
某班女生人数相当于男生的 78 ,女生人数占全班人数的____.
可以随重物一起移动的滑轮叫做____。