A:why
B:that
C:what
D:which
My mother enjoys making paper cuttings. It's one of her _______.
洗衣机、空调、电冰箱等家用电器都使用三孔插头、插座,如图所示,插座中有一个孔是用来接地的。如果在你家中这个孔没有接地,将会发生的现象是( )