甲数的30倍和乙数的40倍相等，如果甲数是4，那么乙数是多少？
4×30÷40．
=120÷40，
=3；
答：乙数是3．
茶树无性繁殖方式有（）（）（）等。
[A] juice[B] coffee[C] milk[D] tea[E] coke[F] orange[G] water
It is black and is always put in bottles.
