奶牛的日粮结构中,日粮粗纤维的含量不宜低于()
A.13%
B.20%
C.18%
D.25%
参考答案:A
---You’d better not eat too much salt. It’s bad for your health.
----_________.
A.Not at all.
B.You’re welcome.
C.I’m thirsty now.
D.Thanks for your advice.
配合和谐的色彩,取决于色彩色相、亮度和纯度的相互作用。