10SMの値が自然数になるような自然数nの 5 うち、もっとも小さいものがどんな数になるか を次のように求めた。口にあてはまるものを 書き入れなさい。 【求め方) 108 を素因数分解すると, 108= だから, ×n 108n 5 I 5 3×n 5 3n よって, が自然数の 5 になるような 自然数nのうち, もっとも小さいものは, ×5=
クラス 番号 名前 図2のように、振動数 子の音源Sと観測者 O、 反射板Rが、 一直線上に並んでいる。Oは静止しており、 Sは速さいでOから遠ざかる向きに運動 している。Rは速さ uでOに近づく向きに運動している。 OとRの距離は十分に大きく、図2のように、 S, 0, R の順で並んでいるときを考える。 ただし、pとuは音速Vより十分に小さく、風は吹いていないものとする。 R S 図 2 問1 Sから出て、0に向かう音波の波長入」を表す式として正しいものを、次の①~⑥のうちから一つ選べ。入1=| 1 0 V-v の f V-20 f 号 V+v 6 f V+2v f 問2 反射板Rに入射する音波の振動数(R で観測される振動数)を表す式として正しいものを、 次の①~6のうちから一つ選べ。 2 S こR V V-u V-2u の V+u 6 V+2u V-G-の A」 Vょ1t分に 小でい よ、て、. とち上げる、 それにとも 04
7 ある数aの小数第1位を四捨五入したら, 53になった。このとき、次 の問いに答えなさい。 口(1) aの範囲を不等号を使って表しなさい。 (2) 誤差の絶対値はもっとも大きい場合でどれだけですか。
下の図のように,合同な2つの直角二等辺三角 形△ABC とAPQR が直線e上にある。△ABC は直線にそって矢印の方向に毎秒2cmの速さ で動く。点Cが点Qの位置にきたときから×秒後 の△ABCとAPQR が重なってできる部分の面積 をy cm?とする。点Cが点Qから点Rまで動くと き,次の問いに答えなさい。2問 A A P e B -6cm - CB Q C R (1) xと」の関係を式に表しなさい。ただし, x の変域は答えなくてよい。 (2) 重なってできる部分の面積の4倍と△ABC の面積が等しくなるときのxの値を求めなさい。
【3】 次の(1)~(5)の英文の ( ) に当てはまる最も適当なものを,それぞれア~エの中から1つずつ選び、その記号を書きなさい。 (1) These pictres ( ア.. took ) by my brother. イ were took ウ. were taken エ、 were taking (2) This is the most interesting book ( ア. in )the five. イ. of ウ、 for エ、 to (3) How( ア. )your father go to work every day? イ. does do ウ、is エ、 has )ttonight. ウ、 have finished No. I( (4) Have you finished your homework yet? am finished ア、finished イ。 エ、 will finish ) one of my friends. (5) The boy who played soccer with your brothers yesterday ( イ。 ア. is are ウ. were エ、 been
【2】次の英文を読んで, 下の(1)~ (5)の英文の( を書きなさい。 )に当てはまる最も適当なものを, それぞれア~エの中から1つずつ選び, その記号 *Ogasawara Islands are a group of islands in *the Pacific Ocean, about. 1000 kilometers south of Tbkyo. There are more than 30 islands, and about 3000 people live on the two largest islands. They are sometimes called “Tolyo's *Hidden Islands' or **the Galapagos of the East". When Ogasawara people go to Tbkyo, they have to take a ferryboat for 24 hours because there is no airport. Ogasawara Islands are far from the main islands, so there are many kinds of *unique plants and animals.They are called *endemic species. Thirty - six percent of the plants on the islands'are endemic species. We can see those plants only in Ogasawara Islands. Because only plants and animals that have *adapted to Ogasawara *environment could *survive, unique *ecosystems were developed. This is a story about people who saved two kinds of animals on Ogasawara Islands. One is a red-headed wood pigeon, Karasu Bato".: This is one of the endemic species on Ogasawara Islands. Birds usually live on trees and *protect themselves from their *enemies. But red-headed wood pigeons on the islands have no enemies, so they live on the ground. Their living environment has changed since people brought cats to the islands as pets. Some of them *went wild and became *stray cats. Amother cat usually has about 20 babies a year, so the number of the stray cats *kept increasing and a lot of pigeons were eaten by them. In 2002, the number of the pigeons was only about 40. People began to think they should do something to protect this endemic species and natural environment on Ogasawara Islands. In 2008, people on the islands, Japanese and *overseas researchers, *public officials and animal doctors met together and started a project to save the pigeons. At thé meeting, they decided to *get rid of the stray cats, but they didn't know what to do. So after the meeting, they asked *the Tbkyo Veterinary Medical Association for advice. Animal doctors in this association *cooperated with a lot of volunteers and started a project to save the stray cats. They said, “The pigeons can't survive outside the islands, but cats can live in Tokyo. We want to save both kinds of animals,” The stray cats were *caught and carried to Tbkyo by ship. Animal doctors and volunteers took care of them and looked for their new fanmilies. From 2008 to 2018, about 800 stray cats were sent to Tokyo to start their new ife. Also, the number of pigeons has increased to about 400 now. This story shows that people may have a bad *influence on the natural environment, but we can protect and make it better by cooperating with each other. A person who took part in this project said, “It is important for us to think how we can keep the natural environment for the future." “Aka-gashira *the Pacific Ocean 太平洋 *unique 独特の *environment 環境 *went wild 野生化した *Hidden 隠された *endemic species 固有種 *ecosystems 生態係 (注) *Ogasawara Islands 小笠原諸島 *the Galapagos ofthe East 東洋のガラパゴス *adapted adapt 「適応する」 の過去形·過去分詞 *protect~ ~を守る *kept increasing 増え続けた *get rid of ~ *suIvive 生き残る *stray cats ノラネコ *public officials 公務員 *enemies 敵 *overseas researchers 海外の研究者 *c0operated 協力した ~を駆除する *caught catch 「~をつかまえる」の過去形·過去分詞 *the Tokyo Veterinary Medical Association 東京都獣医師会 *influence 影響
【2】次の英文を読んで, 下の(1)~ (5)の英文の( を書きなさい。 )に当てはまる最も適当なものを, それぞれア~エの中から1つずつ選び, その記号 *Ogasawara Islands are a group of islands in *the Pacific Ocean, about. 1000 kilometers south of Tbkyo. There are more than 30 islands, and about 3000 people live on the two largest islands. They are sometimes called “Tolyo's *Hidden Islands' or **the Galapagos of the East". When Ogasawara people go to Tbkyo, they have to take a ferryboat for 24 hours because there is no airport. Ogasawara Islands are far from the main islands, so there are many kinds of *unique plants and animals.They are called *endemic species. Thirty - six percent of the plants on the islands'are endemic species. We can see those plants only in Ogasawara Islands. Because only plants and animals that have *adapted to Ogasawara *environment could *survive, unique *ecosystems were developed. This is a story about people who saved two kinds of animals on Ogasawara Islands. One is a red-headed wood pigeon, Karasu Bato".: This is one of the endemic species on Ogasawara Islands. Birds usually live on trees and *protect themselves from their *enemies. But red-headed wood pigeons on the islands have no enemies, so they live on the ground. Their living environment has changed since people brought cats to the islands as pets. Some of them *went wild and became *stray cats. Amother cat usually has about 20 babies a year, so the number of the stray cats *kept increasing and a lot of pigeons were eaten by them. In 2002, the number of the pigeons was only about 40. People began to think they should do something to protect this endemic species and natural environment on Ogasawara Islands. In 2008, people on the islands, Japanese and *overseas researchers, *public officials and animal doctors met together and started a project to save the pigeons. At thé meeting, they decided to *get rid of the stray cats, but they didn't know what to do. So after the meeting, they asked *the Tbkyo Veterinary Medical Association for advice. Animal doctors in this association *cooperated with a lot of volunteers and started a project to save the stray cats. They said, “The pigeons can't survive outside the islands, but cats can live in Tokyo. We want to save both kinds of animals,” The stray cats were *caught and carried to Tbkyo by ship. Animal doctors and volunteers took care of them and looked for their new fanmilies. From 2008 to 2018, about 800 stray cats were sent to Tokyo to start their new ife. Also, the number of pigeons has increased to about 400 now. This story shows that people may have a bad *influence on the natural environment, but we can protect and make it better by cooperating with each other. A person who took part in this project said, “It is important for us to think how we can keep the natural environment for the future." “Aka-gashira *the Pacific Ocean 太平洋 *unique 独特の *environment 環境 *went wild 野生化した *Hidden 隠された *endemic species 固有種 *ecosystems 生態係 (注) *Ogasawara Islands 小笠原諸島 *the Galapagos ofthe East 東洋のガラパゴス *adapted adapt 「適応する」 の過去形·過去分詞 *protect~ ~を守る *kept increasing 増え続けた *get rid of ~ *suIvive 生き残る *stray cats ノラネコ *public officials 公務員 *enemies 敵 *overseas researchers 海外の研究者 *c0operated 協力した ~を駆除する *caught catch 「~をつかまえる」の過去形·過去分詞 *the Tokyo Veterinary Medical Association 東京都獣医師会 *influence 影響
【1】 次の英文を読んで, 下の各設問に答えなさい。 These days, many people say that *agriculture is very important. We have( ① ) many kinds of things, such as rice, fruits and vegetables for a long time. Through agriculture, a lot of foods are produced, so we are able to have food every day. Agriculture is necessary for our lives in many ways. の In Japan today, more and more people are thinking about agriculture. People want to get safe food for their health. Some people ask, “Where do these carrots come from?” or “Do the farmers use *agricultural chemicals?” So, many people like to buy fruits and vegetables produced near their homes.It is called chisanchisyo in Japanese. In the United States, they have the *movement called *Community Supported Agriculture (CSA).. People give some money to the farmers( 3) in their *local area. They can get fruits or vegetables from the farmers *instead of going to the stores. In other words, *consumers support the farmers in their own community. 4) Chisanchisyo and CSA have good points for both consumers and farmers, For consumers, frst, they can know where the fruits and vegetables were produced. Second, those products are fresh and taste delicious because ⑤ thev [farms/ are/ in/ stores / carried / to/ from」 a short time.*In addition, consumers can choose the farmers who don't use agricultural chemicals. For farmers, first, they can understand consumers' needs quickly. Second, farmers can make a lot of **profit because they can cut back on *distribution cost. They can sell ther products which they cannot send to supermarkets. 6 So these kinds [ better / a chance for / give consumers / of movements/ can / getting」 products. Farmers are careful about the safety of food: Agricutural chemicals are used to *protect firuits and vegetables from *insect pests, but (O) too much chemicals is sometimes bad for people. So, some farmers are trying to produce fruits and vegetables( agricultural chemicals. Instead of agricultural chemicals, they use sonme kinds of insects and special plants. For example, some farmers use *ladybugs. They like to eat *plant lice. Plant lice are insect pests of vegetables. Iffarmers do not take action, 'many vegetables will be eaten by them. So the farmers hope that ladybugs will eat many plant lice. *companion-plants. They are plants which help to reduce insect pests and make vegetables better. Green onion is one plant that reduces plant lice on tomatoes. Plant lice don't like the strong smell of green onion, so farmers protect vegetables by planting them near tomatoes. As a result, farmers don't need to use any agricultural chemicals. Farmers are trying to produce vegetables which don't use agricultural chemicals. To get safe and healthy foods, consunmers and farmers need to help each other. Also, we are nowthinking about using not only natural ways but also new technology such as robots. Other farmers use
