In order to protect against a drop in price of the stocks you hold, you decide to lock in stock prices by signing a contract with financial intermediaries. What is the type of financial decision you m
A. Consumption and saving decision
B. Investment decision
C. Financing decision
D. Risk-management decision
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原核生物DNA复制错误率低的原因中，解释错误的是（）
A. DNA Pol I具有3’→5’外切酶活性
B. DNA Pol I及III均具有校对功能
C. DNA Pol III具有5’→3’外切酶活性
DNA Pol III具有3’→5’外切酶活性
下列同时具有校对、修复及缺口填补功能的酶是（）
A. DNA pol V
B. DNA ligase
C. DNA pol δ
DNA pol I
列对大肠杆菌DNA聚合酶的叙述，不正确的是（）
A. DNA Pol I可分为大小两个亚基
B. DNA Pol I具有5’→3’的外切酶活性
C. DNA Pol III在复制中链的延长阶段起主要作用
DNA Pol III由四个亚基组成
Which is not the advantages of a corporation（）
A. Easy transfer of ownership
B. Limited life
C. Easy to get financing
D. Entitled to sign contracts
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