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【简答题】
某液压泵的工作压力 p = 10MPa ,转速 n = 1450r/min ,泵的排量 V = 46.2mL/r ,容积效率 η V = 0.95 ,总效率 η = 0.9 ,求液压泵的输出功率 P 为( ) KW ,驱动该泵所需电动机的功率 P 电 为( ) KW。 结果保留两位小数
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【单选题】Ocean Passages for the World is updated by ____.
A.
Notices to Mariners Weekly Edition
B.
Admiralty Notices to Mariners Weekly Edition ( ANMW)
C.
NP237
D.
Annual Summary of the Admiralty Notices to Mariners
【简答题】表征钢筋塑性性能的常用指标是 [填空(1)] 。A. 伸长率
【单选题】On mid-ocean waters，the height of a wind-generated wave is not affected by the（）.
A.
water depth exceeding 100 feet
B.
fetch
C.
wind's velocity
D.
duration of the wind
【单选题】Hydrothermal vents along the mid-ocean ridges host ephemeral ecosystems of diverse fauna, including several crustacean species, some of which undergo development as larvae up to 1,000 meters above and...
A.
Adaptive Visual Metamorphosis in Deep-Sea Vent Crabs
B.
Aspects of the General Anatomical Development of Deep-Sea Vent Crabs
C.
New Research Directions in the Study of Deep-Sea Vent Crabs
D.
Common Features of Optics of Lower Depth Oceanic Animals
E.
Patterns of Anatomical Transformation in Lower Oceanic Creatures
【单选题】In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?
A.
effect of the moon’s gravity
B.
fetch
C.
Wind velocity
D.
Length of time a wind has been blowing
【单选题】下面代码可以实现二分查找, while() 循环的条件为:() int s=0,t=n-1; int mid; while ( _____ ) { mid = ( s+t )/2; if ( a[mid] == key ) return mid; if ( a[mid] < key ) s=mid+1; else t=mid-1; }
A.
s<=t< /div>
B.
s>t
C.
s==t
D.
s
【单选题】Hydrothermal vents along the mid-ocean ridges host ephemeral ecosystems of diverse fauna, including several crustacean species, some of which undergo development as larvae up to 1,000 meters above and...
A.
Adaptive Visual Metamorphosis in Deep-Sea Vent Crabs
B.
Aspects of the General Anatomical Development of Deep-Sea Vent Crabs
C.
New Research Directions in the Study of Deep-Sea Vent Crabs
D.
Common Features of Optics of Lower Depth Oceanic Animals
E.
Patterns of Anatomical Transformation in Lower Oceanic Creatures
相关题目：
【单选题】下面代码可以实现二分查找, while() 循环的条件为:() int s=0,t=n-1; int mid; while ( _____ ) { mid = ( s+t )/2; if ( a[mid] == key ) return mid; if ( a[mid] < key ) s=mid+1; else t=mid-1; }
A.
s<=t< /div>
B.
s>t
C.
s==t
D.
s