储存干草应注忌哪些问题?
参考答案:
防止垛顶塌陷,漏雨,防止垛基受潮,防止干草过度发酵与自然;注忌通负和防雨。
The story happened in________ and the hero was in his________.
A.1840s;thirty
B.the 1840s;thirty
C.1840s;thirties
D.the 1840s;thirties
短链脂肪酸的碳链含碳数为()
A.6碳以下
B.10碳以下
C.8~12碳
D.14~24碳
E.26~30碳