播种造林（直播造林）
参考答案：
是将林木种子直接播种在造林地上进行造林的方法。
— I can't understand why my mother always keeps me hard at my work.
— When you ____ children of your own, you will understand. [ ]
A. will have
B. are having
C. have had
D. have to have
药物性皮炎：
A．中毒型B．炎症型C．增生型D．赘生型和癌变E．畸形发育型下列药源性疾病各属哪种类型
