Why was the symbol of the Red Cross designed with a red cross on a white ground?
A.To honor Swiss heroes who died in the war.
B.To show Switzerland was neutral.
C.To pay tribute to Switzerland.
D.To show gratitude to the Swiss government for its financial support.
第6题
枸橼酸芬太尼含有
A.吗啡喃结构
B.苯吗喃结构
C.哌啶结构
D.氨基酮结构
E.环己基胺结构
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