题目内容

【题目】下列有关洗涤的说法中错误的是（ ）

A．用汽油溶解衣物上的油渍

B．用洗洁精乳化餐具上的油污

C．用食醋洗去热水瓶中的水垢

D．用热的纯碱溶液洗去菜刀上的铁锈

【答案】D

【解析】A．汽油能除油污是因为汽油能溶解油污；B．洗洁精除油污主要利用的是乳化作用；C．食醋能除去水垢是因为食醋能和水垢发生化学反应生成溶于水的物质；D．铁锈不溶于纯碱溶液，纯碱溶液也不能与铁锈起反应，不可能洗掉铁锈．

练习册系列答案
相关题目

【题目】下列常见的物质中，不代表同一种物质的是( )。

A．氯化钠、盐 B．氢氧化钠、苛性钠

C．碳酸钠、纯碱 D．碳酸氢钠、小苏打

【题目】补全对话（5小题，每小题2分，共10分）

读下面的短文，在空白处填上合适的单词或句子，使短文意思通顺合理、结构完整。

Shop worker: Hello, 1 , madam?

Susan: I’d like to choose a T-shirt for my husband.

Shop worker: 2 does your husband like?

Susan: Blue.

Shop worker: How about this blue one?

Susan: It’s nice, but I’m afraid it’s too 3 .

Shop worker: What size does he take?

Susan: Size XXL.

Shop worker: This blue one is Size XXL.

Susan: How much is it?

Shop worker: It’s fifty-eight dollars, but there is a sale on today, and everything is 4 , so you only need to pay twenty-nine dollars for it.

Susan: I’ll 5 it.

Shop worker: Thank you.

【题目】__________ spell it?

A. Are you B. You can C. Can you D. You do

【题目】— __________ did you spend on this new computer, Dave?

—About 5,000 yuan.

A. How much B. How many C. How often D. How long

【题目】溶液在生产、生活中应用广泛．下列有关溶液的说法正确的是（ ）

A．均一、稳定的液体都是溶液

B．溶液中不能同时存在两种溶质

C．只有固体和液体可以作为溶质

D．外界条件不改变，溶质溶剂不会分离

【题目】B

What do we do when we go camping? First, we think of a plan. We take food, clothes, a knife, and things for cooking and eating. We take things to keep us away from insects(昆虫) and the sun. Then we put everything into the car and we drive to the woods. We look for a place for campers(露营者) and we look for a good place for our tent(帐篷). The place should have a lot of air. This will keep some insects away. High land with water on both sides of it is good. Then we put up our tent. We put everything into the tent, and we are ready for fun. We can swim in the lake, walk in the woods, climb a mountain, row a boat, or go fishing. In the evening we come back to the tent, we build a big fire because it can keep the insects away. We sit around the fire and talk. We may tell interesting stories or we may sing songs. At night we lie down on the grass. We can look up at the stars. It is a busy day, so we try to go to sleep early. Everything is dark. Everything is quiet. We hope we won’t hear music from the radio in the next tent. We hope it won’t rain.

【1】Before going to camp we should first __________.

A. think of a plan B. take some food

C. take things to keep us warm D. take something for cooking and eating

【2】 We go to camp __________.

A. by bus B. bycar C. by bike D. on foot

【3】Campers can join in __________ activities.

A. one or two B. only a few

C. many D. two or three

【4】In the evening we build a fire because __________.

A. it is cold at night B. it can keep us warm

C. it can keep the insects away D. it is dark and quiet

【5】The campers like to __________ at night.

A. hear music from the radio B. go to sleep early

C. have rain D. be busy

【题目】 My parents __________ the Voice of China on TV.

A. are all like B. all like

C. are both like D. both like

【题目】Hello，my name is Tony．Welcome to our school．Our school is very big．We can do many activities at school．

Our last class finishes at 3．10 pm．If you walk in the school after 3．10，you can see many students in the music room，the library，the computer room and the Art Club．There aren’t any sports centre in our school，but the students can go to the sports centre near our school and play basketball there．I usually draw pictures in the Art Club in my free time．Our art teacher Jack organizes it．He says he wants to help the students know more about art．My friend Peter usually draws pictures there with me．My sister Amy is in my school too．She likes to sing and dance．Her music teacher Erica likes her very much．Sometimes．when she doesn’t want to sing or dance，she comes to the Art Club and draws pictures with me．

【1】There isn’t a________in Tony’s school·

A. 1ibrary B. music room

C. sports centre D. computer room

【2】Tony usually goes to the Art Club with——·

A. Erica B. Peter C. Amy D. Jack

【3】What doesn’t Amy do in her free time?

A. Dancing． B. Drawing pictures·

C. Singing． D. Playing football·

【4】What can we know from the passage?

A. Many students stay at school after 3．10 pm·

B. Amy doesn’t like singing．

C. Tony is the only child in his family·

D. Amy teaches Music in Tony’s school·

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网