题目内容

下述四组能源中，哪一组全部是可再生能源？（）

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~ You will hear five short pieces, ~ For each piece decide what the speaker is, ~ Write one letter (A-H) next to the number of the piece.~ You will hear the five pieces twice, 13 14 15 16 17 A to deal with the systems administration B an assistant C a group accountant D a host E a worker F an administrator G a teacher H a doctor 13_

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总承包服务费应按照省级或行业建设主管部门的规定计算，招标人仅要求对分包的专业工程进行总承包管理和协调时，－般可按分包的专业工程估算造价的（）计算。

A. 0．5％
B. 1．5％
C. 2．5％
D. 3％

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It can be inferred from the passage that e-mail phones are designed to

A. make transmission of e-mail messages faster．
B. make communication through e-mails cheaper．
C. make communication through e-mails easier．
D. make communication through e-mails more popular．

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我国目前国债回购交易采用T+1交割、交收。（）

A. 对
B. 错

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