前向一体化
参考答案：
就是企业通过收购或兼并若干商业企业，或者拥有和控制其分销系统，实行产销一体化。
选用 by, with, in, through, use填空.
1. He dug a hole in the ground _ his bare hands.
2. May I your knife to cut my pencil?
3. He said a low voice,"Go to your seat."
4. You can make a living borrowing some money from your friends.
5. They have made much progress____ their hard work.
体弱便溏者忌服的是（）
A.天仙子
B.生千金子
C.巴豆
D.生半夏
E.生草乌
