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【简答题】
{ 一标准直齿圆柱齿轮与一直齿圆柱齿轮的模数、齿数相同,且直齿圆柱齿轮的齿形角为15 0 ,两齿轮相比较,直齿圆柱齿轮的基圆较____,齿顶较____,轮齿的承载能力变____。 }
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举一反三
【单选题】下列不属于农药的“三致”的是
A.
致癌
B.
致畸
C.
致抗性
【简答题】赏读电视片中经典台词,结合图文材料回答问题。(30分) “中国拥有众多的人口,也拥有世界上最丰富多元的自然景观:高原、山林、湖泊、海岸线……这种地理和气候的跨度有助于物种的形成和保存,任何一个国家都没有这样多潜在的食物原材料。” ——第一集《自然的馈赠》 (1)填表概括我国农业物产丰富的原因。 “在中国,五谷始终是一个变化中的概念。今天,中国粮食产量的前三名已经变成稻谷、小麦和玉米。……生活在不同...
【单选题】Suppose an oligarch alone makes the most profit. In calculating profits, if the output effect is greater than the price effect in the marginal unit of production, then the oligarch ()
A.
Have the maximum profit
B.
should produce more units
C.
More units should be produced less
D.
Should be out of the business
【单选题】根据下面资料,回答题: 2013年11月15日15时20分,J市地铁2号线××站工段施工工地(露天开挖作业)发生地面塌陷事故,造成长约100 m、宽约50 m的正在施工区域塌陷,施工现场西侧路基1陷达6 m左右,将施工挡土墙全部推垮,自来水管、排污管断裂,大量污水涌出,同时东侧河水及淤泥施工塌陷地点溃泻,导致施工塌陷区域逐渐被泥水淹没。事故造成在此处行驶的11辆汽车下沉陷落(车上人员2人轻伤,其余...
A.
特别重大事故
B.
重大事故
C.
较大事故
D.
一般事故
E.
重伤事故
【判断题】The effect of an inverted output being connected to the inverting input of another gate is to effectively eliminate one of the inversions, resulting in a single inversion.
A.
正确
B.
错误
【单选题】The efficiency and output capacity of a low pressure distilling plant will be reduced if the last effect shell
A.
pressure does not fluctuate rapidly
B.
pressure remains steady and unchanged
C.
brine density does not exceed 1.5
D.
brine density is too low
【单选题】The output impedance of current-shunt feedback amplifier ( ) the output impedance of its op-amp.
A.
is increased when compared to
B.
is decreased when compared to
C.
is reduced by half when compared to
D.
has no effect on
【简答题】根据下面资料,回答题: 2017年11月15日15时20分,J市地铁2号线××站工段施工工地(露天开挖作业)发生地面塌陷事故,造成长约100 m、宽约50 m的正在施工区域塌陷,施工现场西侧路基1陷达6 m左右,将施工挡土墙全部推垮,自来水管、排污管断裂,大量污水涌出,同时东侧河水及淤泥施工塌陷地点溃泻,导致施工塌陷区域逐渐被泥水淹没。事故造成在此处行驶的11辆汽车下沉陷落(车上人员2人轻伤,其余...
【单选题】In the market for real output, the initial effect of an increase in the money supply is to
A.
shift the aggregate supply curve to the lift.
B.
shift the aggregate supply curve to the right.
C.
shift the aggregate demand curve to the left.
D.
shift the aggregate demand curve to the right.
【单选题】The output effect of a proportional increase in all inputs is called:
A.
returns to scale.
B.
returns to a factor.
C.
total product.
D.
marginal product.
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