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[主观题]

Which of the following statements about databases is wrong （）

A．Database and database system are not the same concepts． The scope of database system is much larger than that of database system．

B．External connection is divided into left connection, right connection and self-connection．

C．The horizontal part of a database table is called a row, the vertical part is called a column, the content of each row is called a record,and the column name of each column is called a fiel

D．Before operating a data table,you should specify in which database the operation is performed using the "USE database name", otherwise the "No database selected" error will be thrown．

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第1题

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第2题

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B．The educated elites usually show contempt for the "unskilled" jobs.

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D．Robots can outperform. humans when doing these "unskilled" jobs.

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第3题

Which of the following statements about résumé headings is correct?

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D.Arrange the important headings as close to the end as you can.

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第4题

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第5题

Which of the following statements about Lake Nyos and Lake Monoun is true?

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第6题

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第7题

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第8题

Which of the following statements about plant structure is correct?

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第9题

Which of the following statements about plastids is CORRECT?

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第10题

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