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阅读理解 There are 365 days in a year. We sleep 8 hours a day, so we have 122 days for sleeping. Then our work time has 243 days left. But there are 52 weekends in a year. Each weekend is two days. We lose another 104 days a year for work. It takes us about one hour to have breakfast and supper. This comes to 15 days over a year. But we can't work all that time-we need a holiday. Let's say we have three weeks' holiday. We don't work all day. Four free hours each evening takes up 61 days. We have to remember that we get 2 days' holiday at Easter, 3 at Christmas and 1 at the New Year. There are also 4 Bank holidays. Take those 10 days away and we have 32 days for work. But then we have one and a half hours' lunch every day, and half an hour's coffee break. That comes to 30 days a year. This means that we have only a few days left for work every year! 1. How many days do we sleep in a year? ___days. A. 365 B. 122 C. 8 D. 52 2. We spend 15 days on __________. A. rest B. coffee break C. lunch D. breakfast and supper 3. Which of the following is true? __________ A. Each weekend is one day. B. We have 61 days for free time. C. We get 3 days' holiday at Easter D. Coffee break takes us one hour. 4. According to the passage, we know that we don't have ______ time to work every year. A. much too B. so many C. too much D. too many 5. The writer means __________. A. we should know the numbers B. a few days for work is enough C. we need more holidays D. time is important and we'd better not waste(浪费) it
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【单选题】苯巴比妥与硫酸铜-吡啶溶液反应,生成( )
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黄色络合物
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紫色络合物
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绿色络合物
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蓝色络合物
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视神经盘凹陷进行性扩大和加深
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C/D差值增大,形成切迹
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双眼C/D差值>0.2
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视神经盘上或其浅表线状出血
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视网膜神经纤维层缺损
【多选题】开角型青光眼的眼底特征性改变为( )
A.
视神经盘凹陷进行性扩大和加深
B.
C/D值增大,形成切迹
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双眼C/D差值>0.2
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视神经盘上或其周围浅表线状出血
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视网膜神经纤维层缺损
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借“资产减值损失”账户;贷“坏账准备”账户
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借“管理费用”账户;贷“应收账款”账户
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借“坏账准备”账户;贷“应收账款”账户
D.
借“坏账准备”账户;贷“资产减值损失”账户
【多选题】开角型青光眼的眼底特征性改变为
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视神经盘凹陷进行性打大和加深
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C/D值增大,形成切迹
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双眼CID差值>0.2
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视网膜神经纤维层缺损
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加入有机溶剂
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正确
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错误
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存储密度大
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插入操作方便
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删除操作方便
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适合各种逻辑结构存储
【单选题】我国的安全电压额定值等级依次分为()。
A.
42V、38V、26V、12V、6V
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42V、36V、28V、12V、6V
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42V、36V、24V、12V、6V
D.
42V、36V、24V、6V、3V
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