我国国内信令网每个信令点编码由（）、分信令区编码和信令点编码组成，采用24位二进制数

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. program B. codeC. testD. software

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.

幽门梗阻的患者最常发生的酸碱平衡紊乱是（）

A.代谢性酸中毒

B.代谢性碱中毒

C.呼吸性酸中毒

D.呼吸性碱中毒

E.代谢性酸中毒合并代谢性碱中毒

做匀加速直线运动的物体，先后经过A、B两点时的速度分别为v和7v，经

历的时间为t，则 (      )

A．前半程速度增加3.5 v               B．前时间内通过的位移为11 v t/4

C．后时间内通过的位移为11v t/4     D．后半程速度增加3v

______实验证明了大气压的存在；______实验测出了大气压的值，一个标准大气压=______Pa，相当于______mm高的汞柱产生的压强．