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我国首个立体电视综合性试验频道中国3D电视试验频道从2012年1月1日起开始试播。下列关于3D电视的表述正确的是（）。

A. 3D电视可分为双画面3D电视、多视点3D电视和真实3D电视．我国3D电视试验频道采用双画面3D电视方式播出
B. 每个人都能看到3D电视呈现的效果
C. 3D电视是一种能够模拟实际景物的真实空间关系的新型电视．它利用人眼的视觉特性产生立体感．让观众感受到观看的影像是具有深度特性的三维立体场景．观众对延伸于屏幕前的景物有触手可及的震撼效果
D. 观看3D电视时间过长，可能产生头晕、目眩、眼痛、头痛的感觉。部分人甚至会恶心呕吐

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回答下列各题 Samuel H．Preston，a sociologistat the University of Pennsylvania，studied how theAmerican family is changing．He reportedthat by the time the average American couple reaches 40 years of age，mey have more parents than children．This finding shows the change in lifestyles(生活方式) and duties of aging Americans．The average middle．aged couple canlook forward to caring for elderly parents some time after their own childrenhave grown up. Because Americans are living longerthan ever，more researchers andsocial workers have begun to study care giving to improve care of the elderly．When people care for an elderly relatiVe，mev often do not use community(社区)services，such as adult(成人)daycare cenVes.If the care givers are adult children，they are more likely to use such services，especially because they of ten have jobs and other business．However，the wife of anelderly person is much less likely to use support ser、7ices or to put the dependent person in a nursing home．Social workers discovered that me reason for this difference wasfear of becoming poor．An ill elderlyperson may live for years，aIld medicalcare aIld nursing homes are very expensive．An elderly couple’s savings can disappear very quickly．The other half，usually thewife，Can be left in poorliving conditions.As a resuh，she often triesto take care of her husband herself for as long as she can. An example of changes in American lifestyles is that__________.

A. theyprefer to have more children
B. meelderly like living with their children
C. themiddle-aged couples have different caregiving duties
D. theaverage age for American couples．to havechildren is 40

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听下面一段对话，回答： What do we know about the man？

A. He’s leaving the hotel．
B. He’S making a phone call．
C. He’S asking about the room rates．

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下列措施中有利于扩大居民消费需求的有（）。 ①实施紧缩性财政政策 ②提高存贷款基准利率 ③完善社会保障体系 ④增加中低收入者收入

A. ①②
B. ①④
C. ②③
D. ③④

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导致养老待遇形成多轨制局面的原因不包括（）。

A. 政府在社会保障政策制定上存在偏向
B. 新农合制度不合理，没有给农民提供有力的保障
C. 政府在制定政策时没有充分考虑社会公平
D. 国家为政府和事业单位退休人员的养老待遇支付了过高成本

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