A、B、C为三种短周期元素，原子序数依次增大。A元素单质为密度最小的气体；B与C两元素的原子最外层电子数都比其次外层电子数少1。则B的元素符号是_______；A与C形成的化合物的电子式为_______。
【答案】
【考情点拨】本题考查了短周期元素原子核外中子排布及电子式书写的知识点。
【应试指导】密度最小的气体单质元素是H，B、C最外层电子数都比次外层少1，故分别为Li、Cl。
假设你是李华，你的朋友Peter邀请你参加周五晚上他举办的周末聚会。而你周五正在南京
出差，周六晚上才能回来。请你用英语给他写一封电子邮件，内容包括：
1．感谢他邀请你参加他的周末聚会；
2．说明你无法参加的原因并表达歉意；
3．表示你出差回来后去拜访他。
注意：1．词数应为100左右；
2．邮件内容须写在答题卡的指定位置上。
Dear Peter，
Yours，
Li Hua
根据下面资料，回答题
提示：马明是个摄影爱好者。他在飞机场遇到一个可爱的美国小男孩Tom，想给他拍几张
照片。
(M=Ma Ming；T=Tom)
M：Hello.I’m Ma Ming.51
T：My name is Tom.
M：52.Tom.
T：I’m 5 years old.
M：53
T：I’m from America.
M：Well，welcome to China.
T：54.
M：Tom，can I take some pictures of you
T：Ask my mom，please.
M：55
T：She’S there in the shop.
第（55）题答案为
根据下面资料，回答题
提示：马明是个摄影爱好者。他在飞机场遇到一个可爱的美国小男孩Tom，想给他拍几张
照片。
(M=Ma Ming；T=Tom)
M：Hello.I’m Ma Ming.51
T：My name is Tom.
M：52.Tom.
T：I’m 5 years old.
M：53
T：I’m from America.
M：Well，welcome to China.
T：54.
M：Tom，can I take some pictures of you
T：Ask my mom，please.
M：55
T：She’S there in the shop.
第（54）题答案为
根据下面资料，回答题
提示：马明是个摄影爱好者。他在飞机场遇到一个可爱的美国小男孩Tom，想给他拍几张
照片。
(M=Ma Ming；T=Tom)
M：Hello.I’m Ma Ming.51
T：My name is Tom.
M：52.Tom.
T：I’m 5 years old.
M：53
T：I’m from America.
M：Well，welcome to China.
T：54.
M：Tom，can I take some pictures of you
T：Ask my mom，please.
M：55
T：She’S there in the shop.
第（53）题答案为
根据下面资料，回答题
提示：马明是个摄影爱好者。他在飞机场遇到一个可爱的美国小男孩Tom，想给他拍几张
照片。
(M=Ma Ming；T=Tom)
M：Hello.I’m Ma Ming.51
T：My name is Tom.
M：52.Tom.
T：I’m 5 years old.
M：53
T：I’m from America.
M：Well，welcome to China.
T：54.
M：Tom，can I take some pictures of you
T：Ask my mom，please.
M：55
T：She’S there in the shop.
第（52）题答案为
根据下面资料，回答题
提示：马明是个摄影爱好者。他在飞机场遇到一个可爱的美国小男孩Tom，想给他拍几张
照片。
(M=Ma Ming；T=Tom)
M：Hello.I’m Ma Ming.51
T：My name is Tom.
M：52.Tom.
T：I’m 5 years old.
M：53
T：I’m from America.
M：Well，welcome to China.
T：54.
M：Tom，can I take some pictures of you
T：Ask my mom，please.
M：55
T：She’S there in the shop.
第（51）题答案为
bid your child's brain become smaller last summer?Probably not,according to a study byDr.Harris Cooper,professor at the University of Missouri-Columbia.The study found that when studentsreturn to school after a long summer vacation,they've lost one to three months worth of learning.
This is more harmful for math than it is for reading."All students lose math skills,"says Cooper.It may be because kids(小孩)have more chances to practice reading than math.Middle-class childrenactually learn more in reading than lower-income students over the summer.Cooper feels that this resultsfrom the variety of activities that many middle-class kids take part in over the summer,such as camping(野营)and trips.
"Parents can help their kids keep educational skills,"says Cooper.He suggests the following tipsto have a learning-filled summer.
1.Keep lots of books around and make regular trips to the library.Most libraries offer special?summer events for kids.
2.Think about what your kids may be learning next year when you plan the family vacation.Talk?with teachers to find out what they'll be covering in class.
3.Keep math in mind.Since kids lose more math skills than anything else over the summer,try to?do some special planning to find math-related activities.
4.Consider summer school.Struggling kids can get a lot of different kinds of help from summer?school programs.Summer school can also enrich and quicken learning in areas where kids show a special?interest.
Remember to keep it fun!You don't want to make your kids unhappy with learning during the?summer break.
What are parents advised to do for their kids in the summer vacation?
bid your child's brain become smaller last summer?Probably not,according to a study byDr.Harris Cooper,professor at the University of Missouri-Columbia.The study found that when studentsreturn to school after a long summer vacation,they've lost one to three months worth of learning.
This is more harmful for math than it is for reading."All students lose math skills,"says Cooper.It may be because kids(小孩)have more chances to practice reading than math.Middle-class childrenactually learn more in reading than lower-income students over the summer.Cooper feels that this resultsfrom the variety of activities that many middle-class kids take part in over the summer,such as camping(野营)and trips.
"Parents can help their kids keep educational skills,"says Cooper.He suggests the following tipsto have a learning-filled summer.
1.Keep lots of books around and make regular trips to the library.Most libraries offer special?summer events for kids.
2.Think about what your kids may be learning next year when you plan the family vacation.Talk?with teachers to find out what they'll be covering in class.
3.Keep math in mind.Since kids lose more math skills than anything else over the summer,try to?do some special planning to find math-related activities.
4.Consider summer school.Struggling kids can get a lot of different kinds of help from summer?school programs.Summer school can also enrich and quicken learning in areas where kids show a special?interest.
Remember to keep it fun!You don't want to make your kids unhappy with learning during the?summer break.
Parents can find out what their kids will study next year by_______.
bid your child's brain become smaller last summer?Probably not,according to a study byDr.Harris Cooper,professor at the University of Missouri-Columbia.The study found that when studentsreturn to school after a long summer vacation,they've lost one to three months worth of learning.
This is more harmful for math than it is for reading."All students lose math skills,"says Cooper.It may be because kids(小孩)have more chances to practice reading than math.Middle-class childrenactually learn more in reading than lower-income students over the summer.Cooper feels that this resultsfrom the variety of activities that many middle-class kids take part in over the summer,such as camping(野营)and trips.
"Parents can help their kids keep educational skills,"says Cooper.He suggests the following tipsto have a learning-filled summer.
1.Keep lots of books around and make regular trips to the library.Most libraries offer special?summer events for kids.
2.Think about what your kids may be learning next year when you plan the family vacation.Talk?with teachers to find out what they'll be covering in class.
3.Keep math in mind.Since kids lose more math skills than anything else over the summer,try to?do some special planning to find math-related activities.
4.Consider summer school.Struggling kids can get a lot of different kinds of help from summer?school programs.Summer school can also enrich and quicken learning in areas where kids show a special?interest.
Remember to keep it fun!You don't want to make your kids unhappy with learning during the?summer break.
Some kids gain in reading over the summer probably because they_______.
bid your child's brain become smaller last summer?Probably not,according to a study byDr.Harris Cooper,professor at the University of Missouri-Columbia.The study found that when studentsreturn to school after a long summer vacation,they've lost one to three months worth of learning.
This is more harmful for math than it is for reading."All students lose math skills,"says Cooper.It may be because kids(小孩)have more chances to practice reading than math.Middle-class childrenactually learn more in reading than lower-income students over the summer.Cooper feels that this resultsfrom the variety of activities that many middle-class kids take part in over the summer,such as camping(野营)and trips.
"Parents can help their kids keep educational skills,"says Cooper.He suggests the following tipsto have a learning-filled summer.
1.Keep lots of books around and make regular trips to the library.Most libraries offer special?summer events for kids.
2.Think about what your kids may be learning next year when you plan the family vacation.Talk?with teachers to find out what they'll be covering in class.
3.Keep math in mind.Since kids lose more math skills than anything else over the summer,try to?do some special planning to find math-related activities.
4.Consider summer school.Struggling kids can get a lot of different kinds of help from summer?school programs.Summer school can also enrich and quicken learning in areas where kids show a special?interest.
Remember to keep it fun!You don't want to make your kids unhappy with learning during the?summer break.
What did Dr. Harris Cooper find in his study?
