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54. What did CCAMLR aim to do according to its science manager?

A) Raise public awareness of the vulnerability of Antarctic species.
B) Ban all commercial fishing operations in the Southern Ocean.
C) Keep the penguin colonies from all fishing interference.
D) Sustain fishing without damaging the Antarctic ecosystem.

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55. How does CCAMLR define its role in the conservation of the Antarctic environment?

A) A coordinator in policy discussions.
B) An authority on big data analysis.
C) A provider of the needed expertise.
D) An initiator of marine sanctuaries.

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甲类功放效率低是因为

A. 只有一个功率管
B. 静态电流过大
C. 管压降过大

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功率放大电路的转换效率是指：

A. 输出功率与晶体管所消耗的功率之比
B. 最大输出功率与电源提供的直流功率之比
C. 晶体管所消耗的功率与电源提供的直流功率之比

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为消除乙类功率放大电路的交越失真现象，应当采用。

A. 甲乙类功率放大电路
B. 甲类功率放大电路
C. 乙类功率放大电路

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54. What did CCAMLR aim to do according to its science manager?

A) Raise public awareness of the vulnerability of Antarctic species. B) Ban all commercial fishing operations in the Southern Ocean. C) Keep the penguin colonies from all fishing interference. D) Sustain fishing without damaging the Antarctic ecosystem.

55. How does CCAMLR define its role in the conservation of the Antarctic environment?

甲类功放效率低是因为

功率放大电路的转换效率是指：

为消除乙类功率放大电路的交越失真现象，应当采用。

A) Raise public awareness of the vulnerability of Antarctic species.
B) Ban all commercial fishing operations in the Southern Ocean.
C) Keep the penguin colonies from all fishing interference.
D) Sustain fishing without damaging the Antarctic ecosystem.