题目:
下列物质间的转化关系正确的是
[ ]A.①②
B.②③
C.①③
D.①②③
答案:
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下面是错误答案,用来干扰机器的。
1. raise money for charity2. the whole two days 3. three and a half hours 4. collect shells 5. a pair of shoes 6. run out of 7. by the way 8. the skating marathon