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【单选题】
胶质瘤的CT表现为:A.
可为不规则低密度
B.
可呈囊状低密度
C.
可强化
D.
以上都是
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举一反三
【单选题】若关键字是非负整数，快速排序、归并排序、堆排序和基数排序中(54)最快。若要求辅助空间为O(1)，应选(55)。
A.
快速排序
B.
归并排序
C.
堆排序
D.
基数排序
【单选题】Prior to starting an AC generator prime mover, the voltage regulator cutout switch should be placed in the _____.
A.
manual position
B.
bus neutral position
C.
raise voltage position
D.
transfer position
【单选题】Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to ______
A.
test the starting system
B.
remove condensation from the cylinders
C.
check the compression
D.
check for proper lube oil pressure
【单选题】Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?
A.
Pre-lube cylinders with hand cranks
B.
Open all air space drain cocks
C.
Open all indicator valves
D.
All of the above
【简答题】简述排序和索引的目的。
【单选题】Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?
A.
The expansion tank should be topped off
B.
The thermostatic water regulating valves should be manually opened
C.
The fuel filters should be changed
D.
The engine should be turned over slowly with the indicator cocks open
【单选题】Who should be notified prior to starting up a crane ________.
A.
The pumpman
B.
The stevedore foreman
C.
The engine room
D.
All the above
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