精英家教网 > 初中地理 > 题目详情

【题目】世界每年因锈蚀而损失的金属数量巨大,防止金属锈蚀已成为科学研究中的重大问题.下列有关金属锈蚀与保护措施的说法不正确的是(

A.铁锈蚀的实质是铁与空气中的氧气、水蒸气等发生了化学反应

B.同样的铁制品在海南比在兰州更易锈蚀

C.在铁表面刷漆可以防止铁锈蚀

D.铝的抗锈蚀性能比铁强,生活中可用钢丝球洗刷铝锅

【答案】D

【解析】铁与氧气、水同时接触,才能生成铁锈,因此A正确.海南的空气湿度比甘肃兰州大,在这种环境下铁制品更易被腐蚀,因此B正确.在铁制品表面刷漆可以起到防锈的作用,因此C正确.铝的抗锈蚀性能比铁强,是因为常温下铝制品表面可形成一层致密的氧化物薄膜,如果用钢丝球洗刷铝锅,会破坏其表面的氧化物薄膜,因此D错误.

练习册系列答案
相关习题

科目:初中地理 来源: 题型:

【题目】实验测得某物质中只含有碳元素,则这种物质( )

A.一定是金刚石或石墨中的一种

B.一定是木炭或活性炭中的一种

C.一定是碳元素的一种单质

D.可能是一种碳单质,也可能是几种碳单质组成的混合物

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】下列常见的盐在生产、生活中的用途不合理的是( )。

A.用亚硝酸钠腌制食品

B.碳酸钠广泛应用于玻璃、造纸、纺织和洗涤剂的生产

C.用纯碱消耗面粉发酵生成的酸

D.天安门前的华表是用大理石做的,碳酸钙还可用作补钙剂

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】I want __________ to the supermarket with my sister this afternoon.

A. go B. to go C. going D. goes

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】下列说法不正确的是

A.回收一个铝饮料罐比制造一个新饮料罐要贵

B.回收铝饮料罐可以节约金属资源

C.回收铝饮料罐可以节约能源

D.回收铝饮料罐可以减少对环境的污染

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】B

Winter Sale!

Winter is coming. So we are having a big and endofautumn sale. Look at the prices!

A blouse:$5

A coat:$20

A silk(丝绸) skirt:$28

A pair of trainers:$30

A pair of jeans:$30

Will you come to Reborn Fashion Shop on the 2nd floor of New Century Shopping Mall between Friday and Sunday?

Cash Back!

Spend twenty dollars in our shop, and we will give you five dollars back. Spend 40 dollars, and you will get 10 dollars back.

Remember:only at weekends

You are welcome to Happy Times Doll Shop on the first floor of New Century Shopping Mall.

Closing Down Sale!

Come to our shop next Monday. There is a discount(打折) on every kind of chocolate. And we will give you a big box of sweets for free(免费的) if you spend more than 20 dollars in our shop. So come to Sweetheart Chocolate Shop on the first floor of New Century Shopping Mall.

1 How many shops are there in this advertisement(广告)?

A. Six. B. Four. C. Three. D. Two.

2 What is the price of a silk skirt in Reborn Fashion Shop?

A. $ 5. B. $ 20. C. $ 28. D. $ 30.

3If(如果) you spend 20 dollars in Happy Times Doll Shop, how much will you get back?

A. 5 dollars. B. 15 dollars.

C. 20 dollars. D. 40 dollars.

4If you want to buy clothes at a lower price, where should you go?

A. Happy Times Doll Shop.

B. Reborn Fashion Shop.

C. Sweetheart Chocolate Shop.

D. The first floor of New Century Shopping Mall.

5What does the underlined word mean in Chinese?

A. 商品 B. 发票 C. 赠品 D. 现金

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】为预防自行车生锈,下列做法中不合理的是(

A.车架表面喷涂油漆

B.钢圈表面镀防护金属

C.链条表面涂机油

D.露天放置,日晒雨淋

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】 Eddie eats __________ food every day. Hobo thinks he needs some __________.

A. too much; exercises B. too many; exercises

C. too many; exercise D. too much; exercise

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】 Miss Fang is __________ English teacher. __________ is a good teacher.

A. our; Her B. my; He

C. mine; She D. my; She

查看答案和解析>>

同步练习册答案