2、(2010·廣州模擬)下列說法正確的是(　 )

①CH₃COONa、BaSO₄都是強(qiáng)電解質(zhì)； ②硬鋁、碳素鋼都是合金材料；③合成纖維、光導(dǎo)纖維都是有機(jī)高分子化合物；④ 0.1 mol·L^-1 NaOH溶液與0.1 mol·L^-1 Ba(OH)₂ 溶液的PH相同；⑤適量CO₂ 分別通入飽和碳酸鈉溶液和澄清石灰水中，都會出現(xiàn)渾濁。

　 A．①②④　　　 　　B．①②⑤　　　　 C．②③⑤　　　　 D．③④⑤

[解析]選B。大部分鹽都是強(qiáng)電解質(zhì)；硬鋁是含鋁、錳、硅等的合金，鋼是鐵、碳合金；光導(dǎo)纖維的主要成分是二氧化硅，不是有機(jī)高分子化合物；0.1 mol·L^-1 NaOH溶液與0.1 mol·L^-1 Ba(OH)₂ 溶液相比，前者的c (OH^-)小，PH�。籆O₂ 通入飽和碳酸鈉溶液會產(chǎn)生NaHCO₃晶體，少量CO₂ 通入澄清石灰水中產(chǎn)生CaCO₃沉淀。

1、(2010·福州模擬)已知298K時，Mg(OH)₂的溶度積常數(shù)K_SP=5.6×10^－12，取適量的MgCl₂溶液，加入一定量的燒堿溶液達(dá)到沉淀溶解平衡，測得Ph=13.0,則下列說法不正確的是(　 )

[解析]選C。A項，PH=13的溶液中，c (H⁺)=10^－13mol/L；B項，溶液中 c (OH^-)=10^－1 mol/L，NaOH抑制水的電離，水電離產(chǎn)生的c (OH^-)=10^－13 mol/L；C項，因為向MgCl₂溶液中加NaOH溶液后混合溶液的PH=13，所以所加NaOH溶液PH＞13；D項，溶液中的c (Mg²⁺)=5.6×10^－12÷10^－2=5.6×10^－10 mol/L。

15．broke up

全 品中考網(wǎng)

根據(jù)課文內(nèi)容用適當(dāng)?shù)脑~填空，使短文完整。

Nowadays bands 1.________ one after another both in China and in other countries.Then 2.________ do people get to form a band? Usually bands are formed by music lovers 3.________ come together to write and play their own music.First，they may play to 4.________ to earn money to make a living，and at the same time 5.________ their music and improve themselves.

6．________，there was a band called “The Monkees”which wasn’t formed 7.________.It was formed by TV organizers who had 8.________ for four musicians in a newspaper.At first not 9.________ the members in the band could sing well，neither could they create their 10.________ music.They 11.________ on each other while playing music.Both the jokes and music were 12.________ loosely on the band called “The Beatles”．In spite of this，the band soon attracted many people，who supported them 13.________.After a year 14.________，they began to play their own instruments and write their own music.And they became even more popular than “The Beatles” and sold even more records.However，the band 15.________ in 1970，but reunited in the mid­1980s.

答案：e into being　2.how　3.who　4.passers­by　5.practise　6.However　7.this way　8.advertised　9.all　10.own　11.played jokes　12.based　13.fiercely　14.or so

5．The wonderful performances of the folk bands attract many passers­by，making them as happy as the performers.

4．Recently，some folk bands have been formed in the neighborhoods，in which music lovers often meet and play various music or sing pop songs.

3．Music can not only convey thoughts and feelings but also better understanding between people.

2．Appreciating music and singing Karaoke is the most popular form of entertainment.

6．音樂，使人們工作、學(xué)習(xí)更輕松，對未來更加有信心了。(feel relaxed，be confident about)

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

答案：[句子翻譯]　1.Today music is becoming more and more popular with people and they attach too　 much importance to it.