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as an engineer ,you must be familiar with SMS .can you please tell what is

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Which of the following factors will affect the selection of a MPU？ ①the pole piece length

A. ①②
B. ②③
C. ①③
D. ①②③

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相机抉择的财政政策通过改变什么来消除通货膨胀缺口？________。

A. 使AD曲线向左移动
B. 使AS曲线向左移动
C. 使AD曲线向左移动同时使AS曲线向左移动
D. 使AD曲线向右移动
E. 潜在GDP线向左移动

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The alarm signal for engine room catching fire is a blast of random bell followed by____.

A. two knocks
B. three Blocks
C. four knocks
D. five knocks

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In order to limit the introduction of alien species by ship, ____was adopted on 13 Feb, 2004 at the IMO.

A. Revised MARPOL annex I
B. Revised MARPOL annex II
C. International convention for the control and management of ships' ballast water and sediments
D. ISPS Code

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