实施物业承接查验，主要依据什么文件。

小明骑自行车的速度为4.5m/s，他以这样的速度行驶20min，行驶的路程为______．

由于长期的河道淤塞，黄河下游的河床已被抬高。沿河农民通常采用如图所示的方式，引黄河水来灌溉农田。有关这种引水灌溉方式，下列说法中错误的是

A．这种取水灌溉方式在使用前必须先让管道中充满水

B．高度差H越大，管道中的水流得就越慢

C．高度差H越大，管道中的水流得就越快

D．管道中水的流动需要借助水泵才能实现

偏心受压构件界限破坏时，( )。

A．离轴力较远一侧钢筋屈服与受压区混凝土压碎同时发生

B．离轴力较远一侧钢筋屈服与离轴力较近一侧钢筋屈服同时发生

C．离轴力较远一侧钢筋屈服比受压区混凝土压碎早发生

D．大偏心受压构件破坏时，混凝土先被压碎

A public-service advertisement advises that people who have consumed alcohol should not drive until they can do so safely. In a hospital study, however, subjects questioned immediately after they consumed alcohol underestimated the time necessary to regain their driving ability. This result indicates that many people who drink before driving will have difficulty following the advertisement’s advice.
Which of the following, if true, most ply supports the argument above

A．Many people, if they plan to drink alcohol, make arrangements beforehand for a nondrinker to drive them home.

B．The subjects in the hospital study generally rated their abilities more conservatively than would people drinking alcohol outside a hospital setting.

C．Some people refrain from drinking if they will have to drive to get home afterward.

D．The subjects in the hospital study were also questioned about the time necessary to regain abilities that do not play an important role in driving safely.

E．(E) Awareness of the public-service advertisement is higher among the general population than it was among the subjects in the hospital study.

化学分析包括（）、（）和（）三部分。