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Modern science suggests that a healthy lifestyle matters much to how long you can live and how well you live. Here are some tips for you to form a healthy lifestyle. Keep a scientific diet. Keep in mind that sugar can be removed from our diet completely. Over intake of sugar is one of the main reasons for getting fat. Over intake of protein or fat and low intake of fiber can also lead to getting fat. We need only a few grams of protein every day to keep our body in order. Like rain to crops, not the more the better. Be always in a good mood. There is a relationship between the mood and health. A good mood keeps you in high spirits. Thanks to the Internet, we can enjoy and learn much without going out. Take a look at some online shops and pick up some bargains, enjoy music and movies and chat with some good friends. Just keep happy. Enough sleep. Two studies show the reasons why teens and adults don’t have enough sleep. With teens, a major reason is mobile phone use; with adults, it’s work. Meanwhile, a third study of young children shows that a lack of sleep in early life may lead to serious problems in future. Everyone needs at least 8-hour sleep to recover from tiredness and the hurt caused by hard work in the daytime. Proper exercise. Do exercise to keep away from fatness. Because of the quick pace of modern life, you don’t have time to do exercise every day, but at least three times a week and 45 minutes each time. 小题1:The author wrote the passage to _______. A.tell the readers how to take proper exercise every day B.provide some advice on how to form a healthy lifestyle C.ask people to care about their health rather than their work D.make some surveys among those who have health problems 小题2: Which of the following can lead to getting fat according to the passage? A.low intake of protein. B.low intake of fat. C.over intake of fiber. D.over intake of sugar. 小题3:The main reason why teenagers don’t have enough sleep is that they _______. A.use mobile phones too much B.have too much homework C.eat too much sugar every day D.don’t have enough exercise 小题4:How many minutes do you need to do exercise at least every week? A.45 minutes. B.90 minutes. C.115 minutes. D.135 minutes. 小题5:What can we conclude from the passage? A.We must take in much sugar for our body’s functioning well. B.The Internet leads to more health problems. C.The least sleep time needed for adults is less that that of teens. D.We need to do many things to form a healthy lifestyle.
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【单选题】等浓度的下列溶液,导电性能最小的是______。
A.
盐酸
B.
醋酸
C.
氢氧化钠溶液
D.
氯化钠溶液
【单选题】半导体材料的导电能力比导体 半导体材料的导电能力比绝缘体
A.
强,弱
B.
弱,强
C.
一样,一样
D.
强,强
【单选题】等浓度的下列溶液中,导电性能最小的是( )
A.
盐酸
B.
醋酸
C.
氢氧化钠溶液
D.
氯化钠溶液
【简答题】现有七种短周期元素,其原子序数按A、B、C、D、E、F、G的顺序递增。A元素的最高正化合 价和最低负化合价的代数和等于O,且A是形成化合物种类最多的元素;C原子能形成分别含10 电子、18电子的两种阴离子,且C与F位于同一主族;D单质投入冷水中反应缓慢,投入沸水中迅 速产生气泡;E的简单阳离子是同周期元素所形成的简单离子中半径最小的。回答下列问题。 (1)B位于周期表第___周期第___族。 (2...
【单选题】原子序数依次增大的X、Y、Z、W四种短周期元素,X、W原子的最外层电子数与其电子层数相等,X、Z的最外层电子数之和与Y、W的最外层电子数之和相等。甲的化学式为YX 3 ,是一种刺激性气味的气体,乙是由X、Y、Z组成的盐。下列说法正确的是
A.
由X、Y、Z组成盐的水溶液呈酸性,则溶液中该盐阳离子浓度小于酸根离子浓度
B.
YX 3 的水溶液呈弱碱性,能使湿润的蓝色石蕊试纸变红
C.
原子半径:Z
D.
W的氯化物熔点低,易升华,但水溶液能导电,由此推断它属于弱电解质
【单选题】等浓度的下列溶液中,导电性能最小的是 ( )
A.
盐酸
B.
氨水
C.
氢氧化钠溶液
D.
氯化钠溶液
【单选题】清末文人童叶庚创始的益智图是由_______ 块散块组成拼板玩具。
A.
9
B.
19
C.
12
D.
15
【简答题】纯净的半导体的导电能力____ 。在纯净的半导体中掺入少量杂质,可以形成 ____ 型半导体 ____ 型半导体,其导电能力比纯净半导体____ 。
【判断题】财务费用和营业费用等期间费用,应于期末时,将其所发生的费用金额,全部转入“本年利润”科目中。 ( )
A.
正确
B.
错误
【判断题】导体的导电能力比半导体强。
A.
正确
B.
错误
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