中国电信CDMA800M网络一共有()个载波的宽带。A.5 B.6 C.7 D.8 发布时间:2019-07-31 16:47 │ 来源:www.tikuol.com 题型:单项选择题 问题: 中国电信CDMA800M网络一共有()个载波的宽带。A.5B.6C.7D.8
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题型:单项选择题 这种材料由30%的玻璃和70%含有磷灰石及硅灰石(钙硅酸盐)的水晶所组成。植入人体后,它所渗出的钙与磷酸能促进新的骨组织在真骨与人造骨之间生长。同时硅灰石晶体就发挥了比真的骨头还结实的强度作用。目前日本厂家已将这种产品______市场,并开始新的开发和医疗试验,使这种材料用于______脊椎骨或______失去的骨头。 文中横线处依次应填入的词是( )。A.放于/替代/加固B.投放/加硬/替换C.投放/加固/替代D.投放/加硬/替代 查看答案