单项选择题
A.dependent
B.in dependent
C.in series
D.in parallel
单项选择题 The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than () of the total bilge pumping capacity.
单项选择题 The minimum number and capacity of bilge pumps and fire pumps and their distributing within the ship is governed by ().
单项选择题 An auxiliary reservoir for starting auxiliary engines should be kept at ().