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【单选题】
1971年,新中国在外交领域的重大成就是( )。A.
新中国在联合国的合法权利得到恢复
B.
恢复在联合国的合法席位
C.
中日两国发表关于建交的联合声明
D.
中美关系实现正常化
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举一反三
【单选题】Students from a wide range of countries attend a professional exam: A questionnaire is sent to a selected number of students at the end of the exam which should be completed compulsorily. The samples ...
A.
Multi-stage
B.
Stratified
C.
Cluster
D.
Systematic
【单选题】Samples are provided by the buyer as the quality standard for the goods. In order to avoid future disputes over the quality of the goods, the seller usually first duplicates the samples and then sends...
A.
duplicate sample
B.
original sample
C.
counter sample
D.
sealed sample
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