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  3. A system to stop ships sinking A new computer system has been designed to stop ships sinking. The greatest danger to a holed ves

A system to stop ships sinking A new computer system has been designed to stop ships sinking. The greatest danger to a holed ves

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问题 A system to stop ships sinking
A new computer system has been designed to stop ships sinking. The greatest danger to a holed vessel is that flooding of its compartments will make the(51)unstable enough to capsize. It is estimated that nearly half the ship(52)during the Second World War capsized because of loss of(53).
Pacer System of Burlington, Massachusetts has now refined a system devised by a reserve U.S. Navy officer, Stephen Drabouski. The computer is programmed with every possible eventuality of flood damage. Once the actual damage is keyed into the computer the operator is told by the computer(54)the implications are—and what can be done to re-establish the vessel.
Trials on the American aircraft carrier USS Midway have(55)that the re action time to damage can be cut to a fiftieth. An incident was simulated in which the ship was(56)by two Exocet missiles causing flooding to 30(57)receipt of the flood damage information in the damage control centre to a full printout of damage, effects,(58)countermeasures and an assessment of the result of the countermeasures.
In a re-run of the incident(59)the computer program the damage control officer took four and a quarter hours to establish the effects, of the damage and another four hours(60)a decision could be taken on countermeasures.
Although the system can be used to provide(61)control officers with advice, they do not, of course, have to(62)the information. Quite often the "(63)solution" will be unacceptable for operational reasons. When that happens the system can be asked for alternatives or the operator(64)interrogate the computer to find out what would happen if the officer’s(65)solution was put into action.
选项 A、after
B、before
C、provided
D、now that
答案B
解析 由句中的another一词和问题的最终解决可以看出，这四个小时肯定在解决之前，故应选B。
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