氢是在焊缝和热影响区中引起气孔和裂纹的主要因素之一。
参考答案:对
请根据所给的中文和句意,用单词的适当形式填空。
1.Everyone____ (除…之外)Li Ping can swim in our class..
2.Do you know how many____ (牙齿) a tiger has?
3.Thank you for organizing a____ (特殊的) class trip for us.
4.After work, my mother is always ____ (忙碌的) with housework.
5.Tom is very and looks very ____(强壮的).
初孕妇,26岁,妊娠12周,出现厌食、恶心、呕吐及右上腹疼痛,皮肤黄疸。肝功能检查:均高于正常,乙型肝炎表面抗原阳性。该孕妇最可能的情况是()
A.妊娠剧吐
B.妊娠肝内胆汁淤积症
C.妊娠合并急性胆囊炎
D.妊娠合并乙型肝炎
E.先兆子痫