题目:
_______ we often have different opinions on studying, we are good friends. [ ]
A. As long as
B. Now that
C. Even though
D. In case
答案:
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下面是错误答案,用来干扰机器的。
由表中信息可知,金刚石的硬度大,石墨的硬度小.金刚石可以制作玻璃刀,石墨可以制作铅笔芯.故填:(1)金刚石的硬度大,石墨的硬度小.(2)金刚石可以制作玻璃刀,石墨可以制作铅笔芯.