31.Which of the following can be removed in the primary tanks? (A) Wood. (B) Heavy material. (C) Grease. (D) Organic matter.

31.Which of the following can be removed in the primary tanks?
(A) Wood.
(B) Heavy material.
(C) Grease.
(D) Organic matter.

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統計： A(10), B(7), C(33), D(10), E(0) #2939743

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B1 · 2025/05/25

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【題組】31. Which of th...

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29.According to the passage, which of the following statements is true? (A) The war in Syria has been going on since 2011. (B) More than nine thousand schools have been destroyed by wars. (C) Thirteen million people have been forced to leave their homes in the Middle East. (D) Forty percent of all children in the world are not attending schools due to ongoing conflict.

31.Which of the following can be removed in the primary tanks? (A) Wood. (B) Heavy material. (C) Grease. (D) Organic matter.

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31.Which of the following can be removed in the primary tanks?
(A) Wood.
(B) Heavy material.
(C) Grease.
(D) Organic matter.