题干
Her piano skills were so good________a ten – year – old that the judges of the contest simply couldn’t believe it.
A：for
B：a
C：to
D：about
答案(点此获取答案解析）
A
A：for
B：a
C：to
D：about
，则用Na、NaOH、NaHCO3与等物质的量的该有机物恰好反应时，消耗Na、NaOH、NaHCO3的物质的量之比为