男，63岁。晨起床时，发现言语不清，右侧肢体不能活动。既往无类似病史。-我要搜题网

[多项选择]物业使用带来的风险包括( )。
A. 高空抛物
B. 维修和维护成本
C. 堵塞消防通道
D. 损坏共用设施设备和场地
E. 改变物业使用动能

[判断题]《劳动法》规定.无固定期限劳动合同.是指用人单位与劳动者约定无确定终止时间的劳动合同.( )
A.正确
B.错误

[单选题]体温在 39 摄氏度以上者怎样测量体温
A.每 2 小时一次
B.每 4 小时一次
C.每日4次
D.每日2次

[单选题]( )是在运输生产过程中,不同单位、部门在生产作业、设备维修、规章制度、安全环境等方面相互衔接、相互配合、相互保障的区域与环节。
A.系统结合部
B.安全生产结合部
C.单位结合部
D.环境结合部

[单选题]Passage 1 Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up. Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks. It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun. Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back. With a strong magnet close by, a compass can no longer tell direction. To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs. Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away from home and let go. On sunny days none of the magnet-pigeons was fooled. They were just as good as the brass-pigeons in starting out in the right direction toward home. On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction,but the magnet-pigeons were in trouble. They later started out in different directions and acted completely lost. Which is true about pigeons' finding directions? 查看材料
A.With a brass on back they can find directions sooner.
B.They can find directions better than other birds.
C.They use the earth's magnetic field and the sun to find directions.
D.They can find directions only to their home.

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