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【单选题】
对于液压舵机，下列说法中正确的是：
A.
舵机液压泵的工作压力越高，则转舵速度越快
B.
进出港口，常采用两台液压泵并联工作以增加舵机的转舵扭矩
C.
舵机的转舵速度，主要取决于主泵供级的流量和系统的漏泄量
D.
液压泵的供油量愈大，液压系统的工作压力愈高
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举一反三
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【单选题】Why did Vera Luiza da Costa e Silva say measures on cigarette smuggling is most important?
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Because smuggled cigarettes are usually cheaper, it is harder to prevent, it spreading.
B.
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C.
Because smokers will pay double price for the same brand cigarette.
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Because smokers in one country are not accustomed to the cigarettes with a different smell from another country.
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【单选题】A customer's monthly bill from the electric company would be an ( ) of the electric company until the customer paid the bill.
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【单选题】When it comes ______ a foreign language, many people wish they had a ______  for it.
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to learning; genius
B.
learn; gift
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to learn; present
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【单选题】设p是正整数n的最小素因数,若( )成立,则n/p是素数
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【简答题】A．British English. B．Adding of foreign words. C．Borrowing from American Indian words. D．Coined by the first British colonists in America.
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相关题目：
【单选题】Why did the author most likely write this article?
A.
to get more people to try the grapefruit diet
B.
to describe how diets come and go
C.
to explain how the grapefruit diet works
查看完整题目与答案
【单选题】Why did most British people play sports?
A.
To keep fit.
B.
To foster a competitive spirit.
C.
Just because they are keen on this game.
D.
Understand the game rules.
查看完整题目与答案
【单选题】佛教来源于哪个国家或地区：（）
A.
波斯
B.
印度
C.
罗马
D.
埃及
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【单选题】交变电流或电压在每秒钟内按正弦波变化的周期次数叫做频率，单位是赫芝（Hz），我们生活中用电的频率是（）。
A.
220Hz
B.
110Hz
C.
50Hz
D.
36Hz
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A.
1个月
B.
3个月
C.
1年
D.
5年
查看完整题目与答案
【单选题】Why did Vera Luiza da Costa e Silva say measures on cigarette smuggling is most important?
A.
Because smuggled cigarettes are usually cheaper, it is harder to prevent, it spreading.
B.
Because smuggled cigarettes are of worse quality.
C.
Because smokers will pay double price for the same brand cigarette.
D.
Because smokers in one country are not accustomed to the cigarettes with a different smell from another country.
查看完整题目与答案
【单选题】A customer's monthly bill from the electric company would be an ( ) of the electric company until the customer paid the bill.
A.
account payable
B.
account receivable
C.
inventory
D.
prepaid expense
查看完整题目与答案
【单选题】When it comes ______ a foreign language, many people wish they had a ______  for it.
A.
to learning; genius
B.
learn; gift
C.
to learn; present
D.
learning; talent
查看完整题目与答案
【单选题】设p是正整数n的最小素因数,若( )成立,则n/p是素数
A.
p>n^(1/2)
B.
p>n^(1/3)
C.
p
D.
p
查看完整题目与答案
【简答题】A．British English. B．Adding of foreign words. C．Borrowing from American Indian words. D．Coined by the first British colonists in America.
查看完整题目与答案