在平面直角坐标系中,坐标轴上到点A(3,4)的距离等于5的点有______个.

题型:填空题

问题:

在平面直角坐标系中,坐标轴上到点A(3,4)的距离等于5的点有______个.

考点:用坐标表示位置
题型:填空题

出自三国两晋南北朝时期的著作是 ()

A.《逐月养胎方》

B.《疗妇人癥》

C.《小品方》

D.《范氏疗妇人方》

E.《十产论》

题型:填空题

A 16-year-old South Dakota boy who became lost while hunting and spent 16 hours alone in the Black Hills National Forest says he was scared but still managed to make a survival plan.

Austin DuVall, of Rapid City, became lost on Nov.3 while hunting with his father. He ran after a deer, and soon found himself alone. “I ran after a deer, but I didn’t get it,” he said. “Then I was really lost.”

He had only his hunting rifle(步枪) and the clothes he was wearing. He had no food or water and had nothing that could help him find his way to safety. “I knew that no one could hear me. I decided to just sleep and get up in the morning and find safety,” he said.

Austin climbed up on a rock and slept through the night. Then he awoke and relied on skills he learned in a hunter safety course. He followed a stream to an occupied cabin. The couple there called his parents and cooked him a breakfast. “ It’s probably one meal I’ll never forget for the rest of my life,” he said.

After DuVall’s disappearance, a lot of emergency officials and more than 100 volunteers went searching for him. “He wasn’t sitting there waiting for someone to come and find him,” said his father, Steve DuVall. “We didn’t find him; he found himself.”

Mike Kintigh, regional supervisor for the Game, Fish & Parks Department, said one or two hunters will go missing each year, but rarely for more than 24 hours. “We’re a little bit unique in the Black Hills as it’s hard to get lost for a very long time. That’s because we’ve got so many roads here compared to the Rocky Mountains,” Kintigh said. “You can certainly spend a very uncomfortable night in the woods like Austin did.”

小题1:After Austin realized he lost his way, he ___.

A.was very nervous but excited

B.cried aloud for help

C.tried to find a safe place

D.decided to sleep in the wild小题2: Who saved Austin according to his father?

A.The couple in the cabin.

B.Emergency officials.

C.Volunteers.

D.Himself.小题3:From what Mike Kintigh said, we learn that _______.

A.if someone gets lost in the Rocky Mountains, it is hard to find a way out

B.too many people go missing in the Black Hills every year

C.the rescue team is skillful enough to find the lost people in less than 24 hours

D.people who are lost in the Black Hills have to spend a night in the woods

题型:填空题

红霉素、阿莫西林、头孢氨苄等药物因对消化道有刺激,应在饭后服用。( )

题型:填空题

在罚任意球时,守方队员必须站在离球9.15米以外的位置,裁判才允许踢任意球。

题型:填空题

简述在产品设计阶段,大批量定制生产所采取的技术方法。

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