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【单选题】
从本质上讲,计算机病毒是一种( )
A.
细菌
B.
文本
C.
微生物
D.
程序
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参考答案:
举一反三
【单选题】One reason that the quantity demanded of a good tends to rise as its price falls is that:
A.
the decrease in price shifts the supply curve downward.
B.
people feel a bit richer and increase their use of the good.
C.
demand has to rise to restore equilibrium after a price reduction.
D.
suppliers are willing to supply more at lower prices.
E.
the decrease in price shifts the demand curve upward.
【单选题】部分多旋翼飞行器螺旋桨加有外框,其主要作用是
A.
防止磕碰提高安全性
B.
提高螺旋桨效率
C.
增加外形的美观
【判断题】Flat file databases are very simple.
A.
正确
B.
错误
【单选题】Three thousand yuan for the computer? That is a very _____ price for such a great product. [     ]
A.
expensive
B.
low
C.
dear
D.
cheap
【单选题】多旋翼飞行器的螺旋桨
A.
桨根处线速度大于桨尖处线速度
B.
桨根处升力系数大于桨尖处升力系数
C.
桨根处升力系数等于桨尖处线速度
【单选题】Stock market price tumbledafter rumor of a rise in interest rate
A.
regulated
B.
increased
C.
fell
D.
maintained 请为划线部分确定1个意义最为接近的选项
【单选题】The average price of milk products is expected to rise considerably in the next month due to the_____costs a ssociated with dairy farming.
A.
decreased
B.
increased
C.
approach
D.
impress
【单选题】A good is called an inferior good if sales______.
A.
are unaffected by income
B.
rise as price increases
C.
decline as price increases
D.
decline as income increases
【单选题】多旋翼飞行器的螺旋桨 ()
A.
桨根处线速度小于桨尖处线速度
B.
.桨根处线速度大于桨尖处线速度
C.
桨根处线速度等于桨尖处线速度
【单选题】多旋翼飞行器的螺旋桨
A.
桨根处的线速度大于桨尖处线速度
B.
桨根处的升力系数大于桨尖处的升力系数
C.
桨根处的升力系数等于桨尖处线速度
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