1.单选题- (共9题)

解不等式①,得x>3,…第一步;
解不等式②,得x>﹣8,…第二步;
所有原不等式组组的解集为﹣8<x<3…第三步.
对于以上解答,你认为下列判断正确的是( )
A.解答有误,错在第一步 | B.解答有误,错在第二步 |
C.解答有误,错在第三步 | D.原解答正确无误 |
A.![]() | B.![]() |
C.![]() | D.![]() |
A.为了了解市民对电影《战狼》的感受,小华在某校随机采访了8名初三学生 |
B.为了了解我国中学生对国家“一带一路”的战略的知晓率,小民在网上向3位中学生好友做了调查 |
C.为了了解“嫦娥一号”卫星零部件的状况,检测人员采用了普查的方式 |
D.为了了解电视栏目《朗读者》的收视率,统计人员采用了普查的方式 |
2.选择题- (共5题)
Knowing how much her own children loved presents at Christmas, Ann Sutton always tried to seek help for one or two poor families. With a social worker mother, the Sutton children had inherited her commitment to service, and knew never to take their good fortune at Christmas for granted. This year, Kinzie, her seven-year-old daughter was thrilled that Santa Claus would make a special visit to a 22-year-old mother named Ashley who worked in a factory raising her 12-month-old son by herself.
The phone rang on Sunday. A representative from a local organization was calling to say that the aid Ann had requested for Ashley had fallen through. No Santa Claus, no presents, nothing.
Ann saw the cheer vanish from her children's faces at the news. Without a word, Kinzie ran into her bedroom. She returned, her face set with determination. Opening up her piggy bank, she put all the coins onto the table: $3.30. Everything she had.
“Mom,” she told Ann, “I know it's not much. But maybe this will buy a present for the baby.”
At a breakfast meeting the next day, Ann told her coworkers about her daughter's story. To her surprise, staff members began to open their purses and empty their pockets to help Kinzie. By day's end, the story of Kinzie's gift had spread beyond Ann's office. She received a call from an unknown donor. If a seven-year-old could give everything she had, he said, he should at least match her gift 100 to 1. He contributed $300.
On Christmas Eve, Ann drove through the pouring rain to the small trailer where the Ashleys lived. Then she began to unload the gifts from the car, handing them to Ashley one by one.
Ashley was very moved. Reflecting on a little girl's generosity, Ashley says she'll one day be able to do something similar for someone else in need. “Kinzie could have used that money for herself, but she gave it away,” Ashley says. “She's the type of kid I'd like my son to grow up to be.”
Knowing how much her own children loved presents at Christmas, Ann Sutton always tried to seek help for one or two poor families. With a social worker mother, the Sutton children had inherited her commitment to service, and knew never to take their good fortune at Christmas for granted. This year, Kinzie, her seven-year-old daughter was thrilled that Santa Claus would make a special visit to a 22-year-old mother named Ashley who worked in a factory raising her 12-month-old son by herself.
The phone rang on Sunday. A representative from a local organization was calling to say that the aid Ann had requested for Ashley had fallen through. No Santa Claus, no presents, nothing.
Ann saw the cheer vanish from her children's faces at the news. Without a word, Kinzie ran into her bedroom. She returned, her face set with determination. Opening up her piggy bank, she put all the coins onto the table: $3.30. Everything she had.
“Mom,” she told Ann, “I know it's not much. But maybe this will buy a present for the baby.”
At a breakfast meeting the next day, Ann told her coworkers about her daughter's story. To her surprise, staff members began to open their purses and empty their pockets to help Kinzie. By day's end, the story of Kinzie's gift had spread beyond Ann's office. She received a call from an unknown donor. If a seven-year-old could give everything she had, he said, he should at least match her gift 100 to 1. He contributed $300.
On Christmas Eve, Ann drove through the pouring rain to the small trailer where the Ashleys lived. Then she began to unload the gifts from the car, handing them to Ashley one by one.
Ashley was very moved. Reflecting on a little girl's generosity, Ashley says she'll one day be able to do something similar for someone else in need. “Kinzie could have used that money for herself, but she gave it away,” Ashley says. “She's the type of kid I'd like my son to grow up to be.”
Knowing how much her own children loved presents at Christmas, Ann Sutton always tried to seek help for one or two poor families. With a social worker mother, the Sutton children had inherited her commitment to service, and knew never to take their good fortune at Christmas for granted. This year, Kinzie, her seven-year-old daughter was thrilled that Santa Claus would make a special visit to a 22-year-old mother named Ashley who worked in a factory raising her 12-month-old son by herself.
The phone rang on Sunday. A representative from a local organization was calling to say that the aid Ann had requested for Ashley had fallen through. No Santa Claus, no presents, nothing.
Ann saw the cheer vanish from her children's faces at the news. Without a word, Kinzie ran into her bedroom. She returned, her face set with determination. Opening up her piggy bank, she put all the coins onto the table: $3.30. Everything she had.
“Mom,” she told Ann, “I know it's not much. But maybe this will buy a present for the baby.”
At a breakfast meeting the next day, Ann told her coworkers about her daughter's story. To her surprise, staff members began to open their purses and empty their pockets to help Kinzie. By day's end, the story of Kinzie's gift had spread beyond Ann's office. She received a call from an unknown donor. If a seven-year-old could give everything she had, he said, he should at least match her gift 100 to 1. He contributed $300.
On Christmas Eve, Ann drove through the pouring rain to the small trailer where the Ashleys lived. Then she began to unload the gifts from the car, handing them to Ashley one by one.
Ashley was very moved. Reflecting on a little girl's generosity, Ashley says she'll one day be able to do something similar for someone else in need. “Kinzie could have used that money for herself, but she gave it away,” Ashley says. “She's the type of kid I'd like my son to grow up to be.”
3.填空题- (共7题)
4.解答题- (共6题)

解:将方程②8x+20y+2y=10,变形为 2(4x+10y)+2y=10③,把方程①代入③得,2×6+2y=10,则 y=﹣1;把 y=﹣1 代入①得,x=4,所以方程组的解为:

(1)试用小明的“整体代换”的方法解方程组

(2)已知 x、y、z,满足

(1)请你设计一种方案,检验木板的两条直线边缘AB、CD是否平行;

(2)若AB∥CD,连接BC,过点A作AM⊥BC于M,垂足为M,画出图形,并写出∠BCD与∠BAM的数量关系.
(1)求证:∠ABD=∠C;
(2)如图2,在(1)问的条件下,分别作∠ABD、∠DBC的平分线交DM于E、F,若∠BFC=1.5∠ABF,∠FCB=2.5∠BCN,
①求证:∠ABF=∠AFB;
②求∠CBE的度数.

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【1】题量占比
单选题:(9道)
选择题:(5道)
填空题:(7道)
解答题:(6道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:11
7星难题:0
8星难题:5
9星难题:5