构成围护结构热惰性指标D的参数中,不包括的参数是______。
A.λ——导热系数 B.δ——围护结构厚度C.s——材料蓄热系数 D.a——内外表面换热系数
参考答案:D
种皮栅状细胞为1列,支持细胞哑铃形的中药材是()
A.苦杏仁
B.小茴香
C.巴豆
D.补骨脂
E.五味子
I hope ____ the little ____ I have been able to do has been of some use.
A.that; that
B.不填;by which
C.what; what
D.不填;with which