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問答題

我國保險(xiǎn)品牌文化應(yīng)具備的要素有（）。

答案： ①誠實(shí)守信②人文關(guān)愛③安全可靠④專業(yè)服務(wù)
A、①②③
B、①②④
C、①③④
D、①②③...

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單項(xiàng)選擇題

Molecular cloning steps in order include:

A、extraction of vector DNA, ligation of target DNA to vector DNA, restriction of target DNA
B、restriction of target DNA, ligation of cut (that is, restricted) target DNA to vector DNA which has already been cut, transformation of host cells
C、cutting target DNA, cutting vector DNA, amplifying target DNA
D、amplifying target DNA, ligating target DNA to cut vector DNA, homologous recombination of target and vector DNA

單項(xiàng)選擇題

氯化消毒副產(chǎn)物主要毒性作用有：

A、致癌變
B、皮膚過敏
C、致突變
D、生殖發(fā)育毒性

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