Why shouldn’t AIDS patients be treated cruelly?
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How have Fisher’s family members reacted to her being infected with HIV?
What does Mary Fisher call on her listeners to do?
配位数是指在晶胞中与任意一个原子最临近的而且等距离的原子数目之和。
A. 对
B. 错
致密度是指晶胞中原子所占的体积与晶胞的体积之比。
A. 对
B. 错
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