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【简答题】
In order to examine the effects of cell phones on people ’ s lives, we presented cell phone owners six effects that might result from mobile phone ownership and these effects were balanced ( 均衡 ) between positive ( 正面的 ) and negative ones. These answers indicate that mobile users see mostly positive benefits ( 益处 ) to mobile technologies — but also some drawbacks ( 缺点 )about the constant connectivity that cell phones offer. When it comes to the positive effects of cell phone ownership, two-thirds (65%) of cell owners say that mobile phones have made it “ a lot ” easier to stay in touch with the people they care about, while just 6% say that their phone has not improved their connections with friends and family at all. About half of cell owners say that their phone has made it at least somewhat easier to plan their daily life, and to be productive ( 有成效的 ) while doing things like sitting in traffic ( 交通 ) or waiting in line. When it comes to the “ dark side ” of cell phone ownership, roughly one in five cell owners say that their phone has made it at least somewhat harder to forget about work at home or on the weekends; to give people their full attention; or to focus on a single task without being distracted ( 分心 ). Most cell owners say that their phone has had no effect at all on their life in any of these negative ways. In all, cell owners are far more likely to view their phone as a time-saver than as a time-waster. Some 33% of cell owners agree with the statement ( 说法 ) that their phone “ saves you time because you can always access the information you need, ” while just 3% agree with the statement that their phone “ costs you time because you are constantly distracted. ” The largest proportion ( 比例 ) of cell owners (56%) say that the time costs and time savings offered by cell phones pretty much balance each other out. (324 words)
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【单选题】只要柱温、固定相及流动相性质不变,即使柱子内径、柱长以及流动相流速有所变化,衡量色谱柱对被分离组分保留能力的参数可以保持不变的是( )。
A.
保留时间
B.
调整保留时间
C.
保留体积
D.
分配系数
【简答题】在你的账套中完成凭证类型为“考试用现金收款凭证”的相关设置,并在下列空格中填入相应的电脑截图。(0.9)
【单选题】下列在[a,b]上函数一定不可积( )。
A.
[a,b] 上的非单调函数
B.
[a,b] 上的不连续函数
C.
[a,b] 上有无限多个间断点的函数
D.
[a,b] 上的无界函数
【单选题】关于慢性硬膜下血肿,下列哪种说法是错误的
A.
多见于中老年
B.
可有精神症状
C.
一定有外伤史
D.
可有肢体偏瘫
E.
可有颅内压增高症状
【多选题】中国坚决维护世界和平与安全,与其他国家共同合作减少威胁国际和平的因素。
A.
第一,加大对联合国的经费和人员支持
B.
第二,坚决支持政治解决热点问题的大方向,反对诉诸武力解决
C.
第三,中国高度重视核安全问题,为维护全球核安全、防范核恐怖主义提出中国主张、采取中国行动
D.
第四,中国积极推动完善亚洲地区安全框架,为维护地区安全和促进地区安全合作扩建平台
【单选题】下列哪些部位癌不是声门上型癌
A.
会厌
B.
真声带
C.
室带
D.
杓会厌襞
E.
杓间区
【单选题】下列在[a,b]上函数一定不可积( )
A.
[a,b] 上的不连续函数
B.
[a,b]上的非单调函数
C.
[a,b] 上有无限多个间断点的函数
D.
[a,b] 上的无界函数
【单选题】关于慢性硬膜下血肿,下列哪种说法是错误的
A.
可有精神症状
B.
可有肢体偏瘫
C.
一定有外伤史
D.
多见于中老年
E.
可有颅内压增高症状
【单选题】关于慢性硬膜下血肿,下列哪种说法是错误的
A.
可有精神症状
B.
可有肢体偏瘫
C.
一定有外伤史
D.
多见于中老年
E.
有颅内压增高症状
【判断题】函数在区间上无界,则在此区间上一定不可积。
A.
正确
B.
错误
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