(﹣x5)x3n﹣1+x3n(﹣x)4

题型:计算题

问题:

(﹣x5x3n﹣1+x3n(﹣x)4

考点:合并同类项有理数的乘方
题型:计算题

参照完整性的规则不包括

A.更新规则

B.删除规则

C.插入规则

D.检索规则

题型:计算题

如图所示,双角钢与节点板采用角焊缝A连接,已知轴心拉力设计值N=420kN(静力荷载),钢材为Q235,焊条E43型,手工焊,焊脚尺寸hf=6mm,焊缝强度,肢背、肢尖内力系数分别为0.65、0.35,试求角钢肢背、肢尖焊缝的最小长度。

题型:计算题

Do you want to live with a strong sense of peacefulness, happiness, goodness, and self- respect? The collection of happiness actions broadly categorized(归类) as "honor" help you create this life of good feelings.

Here's an example to show how honorable actions create happiness.

Say a store clerk fails to charge us for an item. If we keep silent, and benefit from the clerk's mistake, we would drive home with a sense of sneaky(鬼祟的) excitement. Later we might tell our family or friends about our good fortune. On the other hand, if we tell the clerk about the uncharged item, the clerk would be grateful and thank us for our honesty. We would leave the store with a quiet sense of honor that we might never share with another soul.

Then, what is it to do with our sense of happiness?

In the first case, where we don't tell the clerk, a couple of things would happen. Deep down inside we would know ourselves as a type of thief. In the process, we would lose some peace of mind and self-respect. We would also show that we cannot be trusted, since we advertise our dishonor by telling our family and friends. We damage our own reputations by telling others. In contrast, bringing the error to the clerk's attention causes different things to happen. Immediately the clerk knows us to be honorable. Upon leaving the store, we feel honorable and our self-respect is increased.Whenever we take honorable action we gain the deep internal rewards of goodness and a sense of nobility.

There is a beautiful positive cycle that is created by living a life of honorable actions. Honorable thoughts lead to honorable actions. Honorable actions lead us to a happier existence. And it's easy to think and act honorably again when we're happy. While the positive cycle can be difficult to start, once it's started, it's easy to continue. Keeping on doing good deeds brings us peace of mind, which is important for our happiness.

79.The author thinks that keeping silent about the uncharged item is equal to___.

A.lying    

B.stealing    

C.cheating    

D.advertising

80.The phrase "bringing the error to the clerk's attention" (in para. 5) means___.

A.telling the truth to the clerk

B.offering advice to the clerk

C.asking the clerk to be more attentive

D.reminding the clerk of the charged item

81.How will we feel if we let the clerk know her mistake?

A.We'll be very excited.

B.We'll feel unfortunate.

C.We'll have a sense of honor.

D.We'll feel sorry for the clerk.

82 .Which of the following can be the best title of this passage.

A.How to Live Truthfully

B.Importance of Peacefulness

C.Ways of Gaining Self-respect

D.Happiness through Honorable Actions

题型:计算题

在参观游览中,如果游客走失,一般情况下,由于地陪熟悉路线,应立即协同全陪进行寻找。( )

题型:计算题

YB25/YB45包装机只有按下控制面板上的紧急停机按钮,才可切断应急开关(NOT-AUS),即切断机器上所有电机的电源,从而中断机器的运行线路。

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