秋栽时间较长自（）均可进行。
A.任何时期
B.落叶至土壤结冻前
C.休眠期
D.土壤结冻后
参考答案：B
There is no reason they should limit how much vitamin you take, ______ they can limit how much
water you drink. [ ]
A. much more than
B. any more than
C. no less than
D. no more than
为什么会发生井漏？井漏有几种？怎么判断？怎么处理？
