委托监理合同的有效期是自合同生效之日起至( )的时间。A．办理竣工验收之时 B．办

制定医学参考值不必备下列哪项（）

A.选用适当的计算方法

B.选定适当的百分界值

C.确定样本足够量的正常人

D.确定指标的单侧或双侧界值

E.算出抽样误差

在物业开发项目的规划设计阶段，下列选项中不属于其早期介入的方法和要点的是（）。

A.从确定的目标客户的角度考虑问题

B.组织物业管理专业人员向建设单位提供专业咨询意见，同时对未来的物业管理进行总体策划

C.对于分期开发的物业项目，对共用配套设施设备和环境等方面的配置在各期之间的过渡性安排提供协调意见

D.参与有关规划设计的讨论会，并从使用、维护、管理、经营以及未来功能的调整和物业保值、增值等角度，对设计方案提出意见或建议

Animals Can Sense Natural Disasters

Among the dead in South Asia’ s tsunami（海啸）were many tourists at Sri Lanka’ s national wildlife park at Yala. But very few of the park’s animals — elephants, buffaloes, monkeys and wild cats — appear to have died. There are theories that animals can sense natural disasters and run away to safety.

First, it’s possible that the animals may have heard the quake before the tsunami hit. The underwater burst produced sound waves known as infrasound（次声）. Humans can’t hear infrasound, but many animals including dogs, elephants, tigers and pigeons can.

A second early warning sign the animals might have sensed is ground vibration（震动）. The great quake would have produced vibrational waves known as Rayleigh waves. These vibrations move through the ground like waves moving on the surface of the ocean but faster. They travel at ten times the speed of sound. The Rayleigh waves would have reached Sri Lanka hours before the water hit. Mammals, birds, insects and spiders can sense Rayleigh waves. So the animals at Yala might have felt the Rayleigh waves and then run to higher ground.

But what about humans? While we can’t hear infrasound, we can feel it, although we don’t necessarily know we’re feeling it. We also experience Rayleigh waves by special sensors in our joints（关节）, which exist just for that purpose. Sadly, it seems we don’t pay attention to the information when we get it. Maybe we screen it out because there’s so much going on before our eyes and in our ears.

小题1:Why did few animals at Yala die when the tsunamis that caused a huge number of human deaths hit?

A．Because human beings cannot hear the infrasonic sound.

B．Because the animals were staying at a higher place in the park.

C．Because the animals were able to run much faster than human beings.

D．Because the animals might have picked up the danger signals and ran away.小题2:Which of the statements about “Rayleigh waves” is true?

A．Rayleigh waves can be felt both by animals and human beings.

B．Rayleigh waves, just like infrasonic sound, can only be felt by animals.

C．Rayleigh waves are vibrational waves that usually cause quakes or tsunamis.

D．Rayleigh waves move on the ocean surface at a speed ten times that of sound waves.小题3:According to the passage, which of the statement is true?

A．We can’t feel the infrasound so we can’t be informed of the danger.

B．We ignore the information of tsunami’s coming even though we can also get it.

C．We were so busy on our minds that we feel neither infrasound nor Rayleigh waves.

D．We can feel Rayleigh waves and infrasound so we can escape the danger like animals.

某患者，60岁。因松动于三个月前拔除，要求修复

基托支持式（）。

A．1mm

B．2mm

C．3mm

D．大于4mm

E．越薄越好

先兆流产与难免流产的主要鉴别点是

A．出血时间长短
B．下腹痛的程度
C．早孕反应是否存在
D．宫口开大与否
E．妊娠试验阳性与否