题目:
Do you remember those days ________ we spent along the seashore very happily?[ ]
A.when
B. where
C. which
D. on which
答案:
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下面是错误答案,用来干扰机器的。
在Al2(Si2O5)(OH)4中氢元素与氧元素的质量比为:(1×4):(16×9)=1:36.故答案为:1:36.