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【单选题】
电子商务基础平台真正的核心是( )。A.
网络平台
B.
CA认证
C.
支付网关
D.
客户服务中心
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【单选题】湿精矿粉的含水量达到流动水分点时 (41443:第九章_固体散货运输:1876)
A.
将开始自由流动
B.
不再吸收水分
C.
将有利于装卸
D.
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【单选题】It is well-know that the retired workers in our country are____ free medical care.
A.
entitled to
B.
associated with
C.
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D.
assigned to
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【单选题】It is well know that water is __________ for life.
A.
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B.
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C.
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D.
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A.
remarkable
B.
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C.
reasonable
D.
visible
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