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通过电喷雾将蛋白质离子化的是

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下列哪项不是蛋白质免疫印迹的步骤

【单选题】Money-market securities have three basic characteristics in common EXCEPTA ().

A. they are usually sold in large denominations
B. they have low default risk
C. they mature in one year or less from their original issue date
D. they are less liquid

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【单选题】Most investors are using the () as an interim investment that provides a higher return than holding cash or money in banks.

A. financial market
B. money market
C. capital market
D. debt market

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【单选题】A variety of money market instruments are available to meet the diverse needs of market participants. The more popular money market instruments include the following EXCEPTA ().

A. treasury bills
B. commercial paper
C. negotiable certificates of deposit
D. securities

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