某箱形基础,上部荷载和基础自重传至基底平均压力Pk=90kPa,土的γ=18kN/m

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问题:

某箱形基础,上部荷载和基础自重传至基底平均压力Pk=90kPa,土的γ=18kN/m3,地下水位在地表下1.0m,计算基础埋置深度为()时为全补偿基础。

A.11m

B.8.0m

C.10m

D.9m

考点:注册土木工程师岩土工程专业案例注册岩土工程师专业案例下午试卷
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有关聚乙烯的说法正确的是 [     ]

A.聚乙烯是通过加聚反应生成的

B.聚乙烯具有固定的元素组成,因而有固定的熔、沸点

C.聚乙烯塑料袋因有毒,故不能装食品

D.聚乙烯因性质稳定,故不易造成污染

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不稳定心绞痛与非ST段抬高心肌梗死的主要区别是:________。

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为在状态空间树中 (53) ,可以利用LC-检索(Least Cost Search)快速找到一个答案结点。在进行LC-检索时,为避免算法过分偏向于作纵深检查,应该 (54) 。

(54)处填()。

A.使用精确的成本函数c (.)来作LC-检索

B.使用广度优先检索

C.使用深度优先检索

D.在成本估计函数 (.)中考虑根结点到当前结点的成本(距离)

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阅读理解。

     Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing?

Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk

about interests both enjoy, such as pop culture, he remembers his more distant relationship with his parents

when he was a teenager.

     "I would never have said to my mom, 'Hey, the new Weezer album is really great. How you like it?" says

Ballmer. "There was just a complete gap in taste."

     Music was not the only gulf. From clothing and hairstyles to activities and expectations, earlier generations

of parents and children often appeared to move in separate orbits.

     Today, the generation gap has not disappeared, but it is getting narrow in many families. Conversations on

subjects such as sex and drugs would not have taken place a generation ago. Now they are comfortable and

common. And parent-child activities, from shopping to sports, involve a feeling of trust and friendship that

can continue into adulthood.

     No wonder greeting cards today carry the message, "To my mother, my best friend."

     But family experts warn that the new equality can also result in less respect for parents.

     "There's still a lot strictness and authority on the part of parents out there, but there is a change happening,"

says Kerrie, a psychology professor at Lebanon Valley College, "In the middle of that change, there is a lot of

confusion among parents."

     Family researchers offer a variety of reasons for these evolving roles and attitudes. They see the 1960s as

a turning point. Great cultural changes led to more open communication and a more democratic process that

encourages everyone to have a say.

     "My parents were on the 'before' side of that change, but today's parents, the 40-year-old, were on the

'after' side," explains Mr. Ballmer. "It's not something easily accomplished by parents these days, because life

is more difficult to understand or deal with, but sharing interests does make it more fun to be a parent now."

1. The underlined word gulf in Para. 3 most probably means _____. [ ]

A. interest

B. distance

C. difference

D. separation

2. Which of the following show that the generation gap is disappearing?[ ]

A. Parents help their children develop interests in more activities.

B. Parents put more trust in their children's abilities.

C. Parents and children talk more about sex and drugs.

D. Parents share more interests with their children.

3. The change in today's parent-child relationship is _____. [ ]

A. more confusion among parents

B. new equality between parents and children

C. less respect for parents from children

D. more strictness and authority on the part of parents

4. The purpose of the passage is to _____. [ ]

A. describe the difficulties today's parents have met with

B. discuss the development of the parent-child relationship

C. suggest the ways to handle the parent-child relationship

D. compare today's parent-child relationship with that in the past

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