2. 外语
  3. Gold (can combined) with silver (in any) proportion, but alloys with 50 (to) 60 percent silver are (the strongest).

Gold (can combined) with silver (in any) proportion, but alloys with 50 (to) 60 percent silver are (the strongest).

admin2004-12-30  48
问题 Gold (can combined) with silver (in any) proportion, but alloys with 50 (to) 60 percent silver are (the strongest).
选项 A、can combined
B、in any
C、to
D、the strongest
答案A
解析
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