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【单选题】
根据第42次《中国互联网络发展状况统计报告》统计,截至2018年6月,我国网民规模达8.02亿,我国手机网民规模达( )亿,网民通过手机接入互联网的比例高达98.3%。A.
7.88
B.
6.68
C.
5.12
D.
9.17
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皮皮学刷刷变学霸
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【单选题】Who were some of the earliest Confucians?
A.
thinkers
B.
the man who hosted and lead rituals as a part of their job
C.
officials
D.
emperor relatives
【单选题】Who were some of the earliest Confucians?
A.
the man who hosted and lead rituals as a part of their job
B.
thinkers
C.
officials
D.
emperor relatives
【单选题】听力原文： From the earliest days, people have wanted to keep some record of their achievements. Thus they build monuments, or they tell stories from parents to children, or they write things down. To give...
A.
They build monuments.
B.
They tell stories from parents to children.
C.
They write things down.
D.
They make professional historians part of their governments' staffs.
【单选题】下列关于链传动运动特性的描述中,( )是不正确的。
A.
平均传动比准确，传动效率较高，承载能力大
B.
在同样使用条件下，结构尺寸较带传动紧凑
C.
既可用于平行轴间的传动，也可及用于非平行轴间的传动
D.
工作时冲击和噪声较大，磨损后易发生跳齿
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