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阅读理解。 Downing the last drop of an expensive famous brand H2O as weIl as remembering to throw the empty bottle in the recycling bin.makes you feel pretty good about yourself, right? It shouldn't. Even when the bottles are recycled, there are all kinds of otherconsequences of swallowing bottled water, says Melissa Peffers, the air-quality program manager for Environmental Defense. The containers are often filled in foraway lands, then shipped from abroad,and stored in refrigerators at your local store. Compare that with the influence on environment of turning on your tap ,filling a glass,and drinking up! Anyone who is choosing bottled water for health reasons ismisguided,says Peffers,'Most bottled water is just tap water.' And what comes out of your tap is carefully monitored to follow the strictrules. Consider another fact that bottled water is surprisingly expensive. especially when compared with the altemative,which is almost free ,andit is astonishing that America's desire for bottled water seems impassibleto satisfy,reaching nearly 30 billion bottles a year. 'My parents' generation never  had  bottled water, 'saysIsabelle Silverman,an Environinental Defense legal adviser. She hasmade a commitment to going bottle free .'You don't need to fetch ithome from the store,and it's cheaper, ' she adds Bottled water's role as a status symbol needs to change,Pefferspoints out. So when a waiter at an expensive restaurant offers'Andwhat's your drink?'that's no reason to forget your conviction(信念). 'Don't be afraid to say,'I'll have tap.' Say it loud enoughthat the other tables nearby can hear you,'Peffers says,'And thenspend that money on a dessert. ' 1. In the first paragraph,the underlined sentence' It shouldn't.' suggest that people________. A. shouldn't feel pleased with finishing the water in the bottle B. shouldn't feel good about drinkinl an expensive brand H2O C. shouldn't be content with just recycling empty bottles D. shouldn't be satisfied with drinking only bottled water 2. According to the author, tap water is_________. A. as safe as bottled water B. more likely to be polluted C. healthier than bottled water D. less convenient than bottled water 3. The underlined part' going bottle free '(in Paragraph 4)means'______'. A. making bottled water free B. abandoning bottled water C. recycling used water bottles D. providing free water containers 4. Why does Peffers ask people to say'I'll have tap.'loudly? A. To encourage them to set an example for others to follow. B. To advise them to save the money for one more dessert. C. To remind them to be aware of their social status. D. To persuade them to speak confidently in public.
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【简答题】14-3-3 ) 图 14.4 电路中 , 开关 K 合上前电路已达稳定。现在 时 K 闭合,试求 时的运算电路。
【单选题】如图所示,是对同一个物体拍摄的两张清晰程度相同的照片底片,拍摄这两张照片时照相机的镜头焦距相同,下列说法正确的是:
A.
拍摄a时,相机与物体的距离较大
B.
拍摄b时,相机与物体的距离较大
C.
拍摄a与b时,相机与物体的距离一样大
D.
无法判断
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A.
正确
B.
错误
【单选题】具有打开纯文本文件功能的程序是( )
A.
画图程序
B.
写字板
C.
图像处理
D.
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【单选题】如下图,这样的相机是:( )
A.
单反相机
B.
双反相机
C.
旁轴相机
D.
大画幅相机
【单选题】如图所示是对同一个物体拍摄的两张清晰程度相同的照片底片,拍摄这两张照片时照相机的镜头焦距相同,下列说法正确的是 [     ]
A.
拍摄甲时,相机与物体的距离较大
B.
拍摄乙时,相机与物体的距离较大
C.
拍摄甲和乙时,相机与物体的距离一样大
D.
无法判断
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A.
参考图3,在景深参数的焦点深度一栏中,增加焦点深度的数值,以增大景深模糊度
B.
参考图3,在景深参数的焦点深度一栏中,降低焦点深度的数值,以增大景深模糊度
C.
参考图3,在景深参数的采样一栏中,增加采样半径,以增大景深模糊度;提高过程总数,使得模糊效果更精细
D.
参考图3,在景深参数的采样一栏中,减低采样半径,以增大景深模糊度;提高过程总数,使得模糊效果更精细
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【单选题】如下图,这样的相机是:( )
A.
单反相机
B.
双反相机
C.
旁轴相机
D.
大画幅相机
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