通常而言,即便是同一种植物,冬季和夏季的抗冻能力也不一样一在夏季活动期多不耐寒,在冬季休眠期则更为耐寒。这是因为春夏季节,植物生长旺盛,养分消耗多于积累,因而其抗冻能力较弱。如北方的梨树,在﹣30~﹣20℃低温下能平安越冬,在春天却抵挡不住微寒的袭击;松树的针叶,冬天能耐﹣30℃的严寒,在夏天如果人为地降温到﹣8℃就会冻死,就是这个道理。
美国是世界上人工智能发现领域的领导者,而中国在发展人工智能方面,有哪些优势呢?首先,在速度方面,中国算是一个巨大的市场,有充足的资本和大胆的企业家,这些企业家是“精益创业”的化身,典型特征是快速失败、平期失败、经常失败,但中国企业家往往能够迅速找到市场机会,推出产品,并在需要时进行调整。例如,在优步和滴滴证明了來车共享的可行性之后,中国的创业公司便抓住了共享热潮,开始尝试各种共事方式:共事单车、共事摩托车、共享混凝土搅拌机和共事手机充电器等。其中绝大多数很快就失败了,但也有一些成为了独角兽,例如摩拜。摩拜每天骑行次数达2000万次,且成立两年后,它成为唯一一家跻身2017品牌50强排行的因特网全业,首次上榜即高居第14位。
渡荆门送别李白 渡远荆门外,来从楚国游。山随平野尽,江入大荒流。 月下飞天镜,云生结海楼。仍怜故乡水,万里送行舟。
中国邮政日前宣布开放全国5000个自提网点,任何一家快递公司发货,均可享受此服务。自提网点包括现有邮政自有网点和“无人值守”的智能快递柜。看似简单的自提系统开放,背后却是智能快递的大市场。企业、专家、主管部门等负责人均认为,智能快递已成为当前政府驱动快递满足消费和商业需求的重要手段。快递员将快递包裹送到置于小区的智能快递柜中,给收件人发送取件短信。收件人经过手机查询——输入密码——开门取件三个步骤,便可将一个快递包裹从智能快递柜中取出,抱回家去。这种方式越来越受到居民和快递员欢迎。中国快递协会常务副会长李惠德说,目前出现的一些智能快递柜,代表着未来中国快递业的发展方向——智能快递,即通过引入信息化、大数据等现代化手段,融合预测等方式,以更加便捷的智能设施(如智能快递柜)和手段满足高密度、高成本、高人力的现代快递工作,通过建设社区的“智能快递站”为消费者服务。
①我7岁上学就读书,一直读了80年,基本上没有间断,不能说对于读书没有一点经验。我所读的书,大概都是文、史、哲方面的,我的经验总结起来有四点: , , , 。 ②先说第一点。古今中外,积累起来的书真是多极了,浩如烟海。但是,书虽多,有永久价值的还是少数,我们要学会选择。可以把书分为三类,第一类是要精读的,第二类是可以泛读的,第三类是只供翻阅的。我们心里先有了这个数,就可以随着自己的专业选定一些需要的书来读。 ③读的时候先要解其言,这就是说,首先要懂得它的文字,它的文字就是它的语言。语言有中外之分,也有古今之别,这叫语言文字关。攻不破这道关,不知道关里边是些什么东西,只在关外指手画脚,那是不行的。当然,攻语言关,要先作许多准备,用许多工具,如字典和词典等工具书这类。
Michelle,a famous lady, has found that more than 25% students are too fat in hercountry. It is a very serious problem. So she starts a Health Program to dealwith it. The Health Program is to reduce the number of fat students today andin the future.
Dealing with a nosebleed(鼻出血)mightseem simple. But recently, the British RED Cross asked parents with youngchildren how to help a child with a nosebleed. About 65 percent of parents didnot ____11____ the correct action to help.
“Her daughter passed away a few days ago. Now,she can’t do the same things she used to do with her daughter. She doesn’t knowwhat to do. Even little things like making dinner and cleaning the house areharder for her to do now. Maybe you can think of a way to help her,” her mothersaid.
For a long time, I guarded the garden of peaceand quiet. When the children followed me into the garden, I would expect themto be out of sight (视野). And I would hand out tasks.
The December day started like any other. Papacame back with his boat full of fish. Mama made breakfast for the family.Seven-year-old Joonas was doing his homework, while his two little brothers ranaround the yard.
All thefamily—my grandparents, my parents, my aunt and uncle, my cousin, my sister andI— ___22___ the turkey. However, turkey is not the easiestthing to ___23___. It takes a lot of time to prepare and a lot ofwork to cook…and there are a lot of chances for things to go wrong.
Chinese taikonauts Zhai Zhigang, Wang Yaping andYe Guangfu carried out the Shenzhou-13 spaceflight mission (任务) that started on Oct. 15,2021. This mission lasts 6 months, which was also a national record. Zhai isthe commander (指令长)who performed China’s first spacewalk in the Shenzhou-7 mission in 2008.
Fiveyears ago, Jennifer, a girl from Australia, came to Xiangtan University tostudy Chinese. There she fell in love with Chinese culture and met her husband,who is a local (当地的) young man. They got married after she finishedher study. Since then, she has started her new life in Xiangtan City.
Bill doesn’t like doingfamily housework at all. He likes to play with his friends in the park.Bill asks his four friends about their housework.Bill: What do you have to do at home, Dan?
Parentsand children often face the challenges of money. Common topics include settingpocket money, learning to save, and deciding to buy expensive things. The goalof most parents is to teach their kids how to deal with money wisely. The goalof most kids is getting money to spend. How can families achieve these goals?
In ourdaily lives, we are often given some boring or tiring tasks. What’s in yourmind when your mom tells you to clean the floor? Have you ever wanted tocomplain(抱怨)? I think most people have.
The boy named Li Banghua is from Hefei. AnhuiProvince. He made the plane completely by himself. The plane is 0.6 meterswide, has a wingspan (翼展) of 4.4 meters and weighs about 40 kilograms.According to a local report, Li just finished his high-school entrance exam ayear ago and got good grades.
Each ofthem has their own experience- two people with synesthesia may both “feel”music, but they almost never feel the music in the same way. For example, onemay feel the music of the violin lightly brushing his face; the other may feelit on her ankle (脚踝). And one’s experience of synesthesia is alwaysthe same. If they see the number 5 in the color blue, then 5 is blue every timethey see it.
Slowlybut surely, Amy and her grandparents were making progress. Boxes of all sizeswere placed on top of each other throughout the house. Amy’s grandparents hadlived in the house for years and they had collected many things.
___14___, I think an interest in Englishis very important. When I was in Grade Three, we had a new ___15___ — English,it was new for me. I was interested in it. I worked hard at it. Soon we had anEnglish exam and I got a very good mark. How ___16___ I was! After that,I learned English harder. Our English teacher often teaches us English songs,and ___17___ sound nice. I often think how interesting English is!