水循环回路的组成及参数有哪些?
参考答案:
自然循环当中,水循环回路共有16个,回路当中水冷壁共有608根,水冷壁的材质是#20钢,其耐热温度是480℃。集中下降管共有6根。
治疗阴虚虚热不退宜选()
A.墨旱莲
B.鳖甲
C.麦冬
D.百合
E.石斛
“39 Steps”is one of the most exciting films_________ directed by my brother.
A.which were
B.which was
C.that was
D.that were