木材的干燥方法有几种?
参考答案:
对湿木材的干燥方法有自然干燥法、窑干法和特种干燥法三大类。
粉末中可见草酸钙结晶的药材是
A.灵芝
B.海藻
C.猪苓
D.冬虫夏草
E.茯苓
We had a really bad time about six months ago but now things are()
A. looking up
B. coming up
C. making up
D. turning up