嗜酸细胞性胃肠炎的药物治疗首选()
A.青霉素
B.泼尼松
C.奥美拉唑
D.5-氨基水杨酸
E.甲氨蝶呤
参考答案:B
Many leaders of the world got together in Copenhagen in order to find ways for people all over the world to ______ the nature.
A.take part in
B.put an end to
C.be in harmony with
D.draw attention to
硫化氢分压(或硫化氢含量)对硫化效果有何影响?