22. This vessel had a crew of 18 Ukrainian nationals, all of whom were appropriately qualified for the positions they held on _______ board the ship. (A) who (B) which (C) whom (D) where

22. This vessel had a crew of 18 Ukrainian nationals, all of whom were appropriately qualified for the positions they held on _______ board the ship.
(A) who
(B) which
(C) whom
(D) where

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統計： A(20), B(94), C(242), D(56), E(0) #1512184

私人筆記 (共 1 筆)

Willie

2021/10/11

私人筆記#3636309

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這艘船有 18 名烏克蘭國民的船員，他們...

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39. Check valves must be provided on pump suctions to prevent pumping through the standby pump to the sump. Pump isolating valves should be provided to permit underway repair of either pump. Based on these descriptions, which is the correct statement？ (A) The isolating valves must be non-return valves. (B) The check valve also needs to be positioned at the pump exit in order to improve the pumping efficiency. (C) The check valve allocated on pump suctions permits no flow from the idle pump into the sump. (D) The check valve allocated on pump suctions permits the isolation of the running and standby pumps so that the isolating valves could be ignored for the emergency operation.

22. This vessel had a crew of 18 Ukrainian nationals, all of whom were appropriately qualified for the positions they held on _______ board the ship.
(A) who
(B) which
(C) whom
(D) where

私人筆記 (共 1 筆)

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