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【判断题】
在我国会展业发展过程中树立为谁服务和如何做好服务的宗旨是会展活动持续举办的基础和前提。()A.
正确
B.
错误
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【简答题】求等差数列8,5,2...的第20项
【简答题】求等差数列8,5,2...的第20项
【简答题】Q组合应该放在该区段中所有道岔的岔尖______侧。
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You don't have to pay to watch it.
C.
You don't have to be a sportsman to take part.
D.
The bus trip to the place of the competition is free.
【单选题】用以下几类工作填筑材料时基本工程性质由好到差的正确排列是( )
A.
砂性土——粉性土——黏性土
B.
砂性土——黏性土——粉性土
C.
粉性土——黏性土——砂性土
D.
黏性土——砂性土——粉性土
【简答题】求等差数列数列的2,5,8,...的第20项
【多选题】In addition to C-S-H gel, hardened cement contains ( ).
A.
unreacted clinker
B.
Ca(OH)2
C.
aluminate hydrates
D.
aluminosulphate
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You can watch it without paying.
C.
You don't have to be a sportsman to take part.
D.
The bus trip to the place of the competition is free.
【简答题】求等差数列 8,5,2 , ... 的通项公式和第 20 项.
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