影响干草营养价值的因素有（）。
A、切短与粉碎的长度
B、原料植物的种类
C、收割期
D、干制的方法
参考答案：B, C, D
（）是指眼睛固定注视一点时所能看到的空间范围。
The famous actor told me that ______ could be more important to him than his family.
[ ]
A. something
B. none
C. nobody
D. nothing
