圣菲研究所（SFI）的主要研究方向是复杂系统科学。
A. 正确
B. 错误
持有国际储备的机会成本越大，其国际储备的保有量应越低。
A. 正确
B. 错误
The type of davit on which you must turn a crank in order to swing the lifeboat out over the ship’s side is a（）.
A. sheath-screw davit
B. gravity davit
C. radial davit
D. bruckner davit
Which two statements about MAC addresses in the Cisco UCS are true?（）
A. The first 2 octets represent the manufacturer OU
B. The first 3 octets represent the manufacturer OU
C. The last 3 octets are assigned by the organization itseIf.
D. The last 4 octets are assigned by the organization itseIf.
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