某公路桥梁由多跨简支梁桥组成，总体布置如图5-32所示。每孔跨径_爱下问搜题

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问题单项选择题 A3型题

某公路桥梁由多跨简支梁桥组成，总体布置如图5-32所示。每孔跨径25m，计算跨径24m，桥梁总宽9.5m，其中行车道宽度为7．0m，两侧各0.75m人行道和0.50m栏杆，双向行驶二列汽车。每孔上部结构采用预应力混凝土箱梁，桥墩上设4个支座，支座的横桥向中心距为3.4m。桥墩支承在岩基上，由混凝土独立柱墩身和带悬臂的盖梁组成，设计荷载：汽车荷载为公路-Ⅰ级，人群荷载为3.0kN／m，汽车荷载冲击系数μ＝0.215。提示：按《公路桥涵设计通用规范》（JTGD60-2004）计算。

假设箱梁支座1在恒载作用下的最大压力标准值为700kN，在汽车荷载作用下的最大压力标准值为600kN（未计入冲击系数），及人群荷载作用下的最大压力标准值为40kN。试问，支座1在持久状况下按承载力极限状态基本组合的最大压力设计值（kN），与下列何项数值最为接近（）？

A.1710

B.1725

C.1850

D.1905

答案

参考答案：D

单项选择题

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
The purpose of the testing phase of software development is not to (71) the absence of errors in the programs being tested, but rather to find as many errors as possible. This statement may seem to contradict one’s intuitive notion of a successful test of a piece of (72) ; however, a successful test is one in which errors have been found, net one in which no errors have been detected.
There are generally two kinds of testing method: human testing and machine testing. In most companies where systems are developed, the first testing that occurs is not machine testing, but rather the detection of errors through (73) , team efforts, referred to as walkthroughs and inspection. With these methods, the author of the program forms a group with others who represent programming expertise or who may be part of the project team.

A. show B. exhibit C. find D. search

After code has been subjected to the manual testing described above, it is then machine test- ed. Again, the test cases are designed to detect the (74) number of errors. Incremental or integration testing occurs subsequent to unit testing. This means combing modules with those that have already been unit tested. The incremental approach not only tests the (75) of each module, but also the "rippling effects" of errors, and the interfaces among modules.

填空题

设A=2，B=-2，则表达式A/2+1＞B+5 Or B*(-2)=6的值是______。