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【单选题】
GB/T1884-2010《石油和液体石油产品密度测定法》要求,测定透明样品密度时,密度计读数为( )与密度计相切的一点。
A.
液体主液面
B.
液体弯月面上缘
C.
液体弯月面下缘
D.
以上均可
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举一反三
【判断题】民国时期,中国跤成为第6届(1935年)、第7届全国运动会的正式比赛项目。
A.
正确
B.
错误
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【单选题】___ six years since I began to study English.
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【单选题】It _____ six years since his grandfather died. [     ]
A.
is
B.
was
C.
had been
D.
will be
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【单选题】( )six years since I began studying English.
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They have been
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It is
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【简答题】电弧电流的本质是离子导电。()
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【单选题】six years since I began studying English.
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They have been
B.
It is
C.
It was
D.
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【多选题】白云岩的形成机理有:
A.
原生沉淀作用、准同生白云化作用、成岩白云化作用
B.
调整白云化作用、淡水白云化作用、混合白云化作用
C.
原生沉淀作用、毛细管浓缩作用、回流渗透白云化作用
D.
原生沉淀作用、次生作用、热液作用、成岩作用
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【简答题】电弧电流的本质是分子导电。( )
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【单选题】It's six years since I _______ him. [     ]
A.
have known
B.
will know
C.
had known
D.
know
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【单选题】__________ nearly six years since I started to study English
A.
It was
B.
There are
C.
It is
D.
There have been
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【判断题】民国时期,中国跤成为第6届(1935年)、第7届全国运动会的正式比赛项目。
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【单选题】It's six years since I _______ him. [     ]
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have known
B.
will know
C.
had known
D.
know
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【单选题】__________ nearly six years since I started to study English
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D.
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